- Douglas Adams. The Hitchhiker's Guide to the Galaxy. New York: Del Ray Books, 2005.
- "The Hitchhiker's Guide to the Galaxy: Study Guide." 18 August 2018. <https://www.coursehero.com/lit/The-Hitchhikers-Guide-to-the-Galaxy/>.
- Danielle M. "Discussion questions for OCTOBER book selection - "Hitchhiker's Guide to the Galaxy"." 4 June 2012. 13 August 2018. <https://www.meetup.com/Syracuse-Book-Club/messages/boards/thread/23915922?_cookie-check=YKtyoHHgEZcyrnq8>.
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