Cita APA (7th ed.)

Adams Douglas. (2002). Ultimate Hitchhikers Guide to the Galaxy. Ballantine Books.

Cita Chicago (17th ed.)

Adams Douglas. Ultimate Hitchhikers Guide to the Galaxy. New York: Ballantine Books, 2002.

Cita MLA (9th ed.)

Adams Douglas. Ultimate Hitchhikers Guide to the Galaxy. Ballantine Books, 2002.