Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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