Adams Douglas. (2002). Ultimate Hitchhikers Guide to the Galaxy. Ballantine Books.
Lua i Stíl Chicago (17ú heag.)Adams Douglas. Ultimate Hitchhikers Guide to the Galaxy. New York: Ballantine Books, 2002.
Lua MLA (9ú heag.)Adams Douglas. Ultimate Hitchhikers Guide to the Galaxy. Ballantine Books, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.