Look for limits/filters
Many databases allow you to specify that you want to search only in “peer-reviewed” or “refereed” sources.
Search online for your journal’s title. Sections like “about this journal” or “editorial policies” generally mention whether the journal is peer-reviewed/refereed.
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Use Ulrich's to find whether a journal has a peer review process.
Reach out with questions via email, or schedule a research consultation.