Cita APA (7th ed.)
Adams, D., & Gaiman, N. The Ultimate Hitchhiker's Guide to the Galaxy. Del Rey Books.
Cita Chicago (17th ed.)
Adams, Douglas, i Neil Gaiman. The Ultimate Hitchhiker's Guide to the Galaxy. Nueva York, EUA: Del Rey Books.
Cita MLA (9th ed.)
Adams, Douglas, i Neil Gaiman. The Ultimate Hitchhiker's Guide to the Galaxy. Del Rey Books.
Atenció: Aquestes cites poden no estar 100% correctes.