Wonders

The Rabbit Hole · Literature review guides

Where to Find Sources for Your RRL (Foreign and Local)

Where Philippine students can find credible related literature and studies: free databases, Philippine journal portals and thesis repositories, plus a step-by-step walkthrough of doing the search in Wonders.

Sep 21, 2026
Where to Find Sources for Your RRL (Foreign and Local)

TL;DR

For foreign literature and studies, search a large scholarly index such as Google Scholar, Wonders, ERIC, PubMed or DOAJ. For local sources, use Philippine E-Journals, HERDIN for health research, your own university's thesis repository, and government sites such as PSA, DepEd and DOH. Build your search from your variables, filter to your school's allowed years, and keep a record of what you searched. Wonders puts the search, saving, grouping and APA export in one workspace. It is a paid tool with a 14-day trial and no free plan, and it does not write the RRL for you.

Before you can write an RRL you need enough credible sources, local ones included, inside your school's allowed date range. This guide lists where to look, then shows the same search done in Wonders.

Before you search

Have three things ready:

  1. Your variables, population and setting, taken from your title. See step 2 of how to write an RRL.
  2. Your school's rules: minimum number of sources, allowed years, and whether you need foreign and local subsections.
  3. A place to log what you find. A spreadsheet works. So does a Wonders project.

Where to find foreign literature and studies

SourceBest forCost
Google ScholarBroad first pass in any fieldFree to search. Full text varies
WondersOne search across 320M+ scholarly works from OpenAlex and Semantic Scholar, plus Google Patents, with a Boolean builder and filtersPaid, with a 14-day trial. Lower-priced Student plan
ERICEducation researchFree
PubMed and PubMed CentralHealth, nursing, psychologyFree
DOAJOpen-access journals in all fieldsFree
Your library's subscriptions (ProQuest, EBSCO, ScienceDirect, JSTOR)Full text behind paywallsFree through your school, if subscribed

Ask your librarian which databases your school pays for.

Where to find local literature and studies

Coverage of Philippine journals and theses in international indexes is incomplete, so local sources need their own search.

If you find little local work, record that. "Few local studies exist on this topic" is a finding you can state in your synthesis, as long as you can show where you searched.

How to do it in Wonders

Wonders is a research workspace for the literature review process: search, organize, write and cite. It is a paid tool. New accounts start with a 14-day trial, and there is no free plan. Here is the RRL search step by step, using the sample topic of bedtime smartphone use and sleep quality among senior high school students.

1. Create a project for your study

Name it after your working title. What you save, highlight and write for this study stays inside the project.

2. Build your query

Start from your variables: "bedtime smartphone use", "sleep quality", adolescents. The Boolean builder lets you combine terms and synonyms, such as "screen time" or "sleep duration", with AND, OR and NOT. Wonders searches OpenAlex and Semantic Scholar. It does not have an index of its own.

3. Filter to your manual's rules

Use the year slider to match your school's recency rule, for example the last ten years for PUP.

4. Run a second search for local studies

Add another search panel to the same project and add Philippines OR Filipino to the query. Coverage of Philippine journals in any international index is incomplete, so pair this with Philippine E-Journals and your library's thesis collection.

5. Screen before you read

Read the abstract and the summary to decide whether a paper is relevant. Quotes shown in a summary are checked against the paper's text. Save the papers that match your variables. Skip the ones that only share a keyword. For a paywalled paper, check whether your library provides access, or look for an open-access version.

6. Read and highlight

Highlight the method, sample and key findings, using colors for your themes. Each highlight stays linked to the paper it came from, and where full text is available a page-number citation opens the PDF at the passage. That is what you need later when your adviser asks where a claim came from.

7. Group sources in the Organize view

Drag saved papers and highlights into groups. Use your manual's headings (Foreign Literature, Local Literature, Foreign Studies, Local Studies) or your themes. The groups become the sections of Chapter 2.

8. Write and export citations

Draft in the Wonders editor or in Word. Citations are generated from the papers you saved. Wonders formats bibliographies in APA, MLA, Chicago, Harvard, IEEE and Vancouver, exports documents as DOCX, PDF, LaTeX, HTML or Markdown, and exports references as BibTeX, RIS or CSV. Check each generated reference against our APA 7th edition guide, particularly for local theses, where metadata is often incomplete.

Try the search step on your own topic. New Wonders accounts start with a 14-day trial, and there is a lower-priced Student plan. Start a trial or see student pricing.

What Wonders does not do

Keep a search record

Panels sometimes ask how you found your sources. Keep a short log:

DateWhere searchedQueryFiltersResultsSaved
[date][database or index]("smartphone use" OR "screen time") AND "sleep quality" AND adolescents[year range][number][number]
[date][same index]same, AND (Philippines OR Filipino)[year range][number][number]
[date]ejournals.phsmartphone sleep students[filters][number][number]
[date]University library thesis catalogsleep, gadget use[year range][number][number]

Fill in the bracketed cells with what you actually did and found. A log like this also lets you state accurately, in your synthesis or scope, where you looked and what you did not find.

Evaluating what you find

Related guides

References

Frequently asked questions

Is there a free RRL finder?

Several free tools find real sources: Google Scholar, DOAJ, ERIC, PubMed and Philippine E-Journals all work without payment. Be careful with sites that promise to generate an RRL from a title. Generated text can contain references that do not exist, and submitting a chapter you did not write is a matter for your school's academic integrity policy. Wonders is not a free generator either. It is a paid research workspace with a 14-day trial, and it searches real published sources that you then read and write about yourself.

Where can I find local studies for my RRL?

Start with Philippine E-Journals (ejournals.ph), which hosts journals from Philippine universities and societies. For health topics use HERDIN (herdin.ph). Then check your own university library's thesis and dissertation collection, since many local theses are not indexed anywhere online. In large indexes such as Google Scholar or Wonders, add Philippines or Filipino, or a region or city name, to your query.

Can I use unpublished theses as related studies?

Yes, unless your manual says otherwise. The PUP thesis manual explicitly counts unpublished theses and dissertations among the works that may be reviewed. Cite them in APA 7 as unpublished theses with the institution name.

Are Scribd, Course Hero and Studocu acceptable sources?

Treat them as leads, not sources. They host user uploads whose origin you usually cannot verify. If you find a useful thesis there, note the author, title and school, then look for the original in the university repository or library and cite that.

How do I know a source is credible?

Check that it has named authors, a publisher or journal you can verify, a date, and a reference list of its own. For journals, check whether the journal is indexed in Scopus, Web of Science, the ASEAN Citation Index or DOAJ. Be wary of journals that promise publication within days for a fee.

Does Wonders write the RRL for me?

No. Wonders helps you search, read, organize and cite. It does not produce a finished chapter for you to submit, and it is designed so that every note and citation traces back to a real paper. The synthesis and the wording are your work.

More useful guides

All literature review guides

Finding these guides useful?

Try these techniques in Wonders — an AI workspace for literature review. 14 days free. Students get 50% off.

Start free →