In general, your secondary sources should fulfill the following criteria:
- Peer reviewed (sometimes also called “refereed”)
- Published in an academic journal (online journals are fine, as long as they are peer reviewed and/or published by academic publishers)
- Books or articles in collected volumes published by academic publishers (list of academic publishers: https://publishersarchive.com/academic-book-publishers.html).
How to check if your sources are peer reviewed:
Peer review means that other scholars from the same field have checked the text before publication – sometimes several times – to make sure it is correct and up to academic standards. Journals will publish information about their peer review process on the copyrights page (print) or on their website (online) – potentially under “information for authors”. Some predatory journals / AI journals will now also claim that their work is peer reviewed. If something seems dodgy, better ask your supervisor if the source is reliable.
Where to find good sources:
- Check library catalogues (Katalog+) or databases (MLA, Google Scholar) or online repositories (JSTOR, Ebsco, Project Muse) and set your search to “peer reviewed” where possible.
- Check the bibliography of the sources you have already found for further suggestions.
- Find handbooks, companions (often published by university presses like Oxford, Cambridge, Edinburgh or similar) on the author's work or topic you're working on.
- If you've taken a course on this topic, check if there are recommendations for further reading in the Moodle course or syllabus.
- Check the Wikipedia entry on your topic. There is often a “Further Reading” section at the bottom. DO NOT USE THE WIKIPEDIA ARTICLE AS A SOURCE.
- Ask your supervisor for recommendations.
The following do NOT count as reliable academic secondary sources:
- Wikipedia or other online encyclopedias
- Snopes, Gradesaver, Spark Notes…
- Handouts or Powerpoint slides (if there are sources ON the handout or slides, try to find the original).
- Online dictionaries (with the exception of the OED.com - but please note that the OED should only be used for GENERAL definitions, not for specialized literary terminology and it can NOT be your only source)
- Other people’s term papers / theses (even if they are accessible on uni websites)
- Newspaper articles or other journalistic texts
- Websites of organizations or companies
- Blogs, social media, personal websites, emails, other personal communications
- Text or entire text passages generated by Chat GPT or similar AI-based chatbots (see department policy).
The only context in which you can use any of these sources is to discuss them as PRIMARY texts, e.g. when writing about how a specific topic is being discussed on social media or how journalists write about an issue, or what an author explained to you in a personal email. If you think you need one of these sources in your thesis, check with your supervisor if your specific use is acceptable (please include information about the source and why you need it in your email).