Adams Douglas. (1992). Hitch Hiker's guide to the galaxy: A trilogy in four parts. Pan Books Publisher.
Lua i Stíl Chicago (17ú heag.)Adams Douglas. Hitch Hiker's Guide to the Galaxy: A Trilogy in Four Parts. London: Pan Books Publisher, 1992.
Lua MLA (9ú heag.)Adams Douglas. Hitch Hiker's Guide to the Galaxy: A Trilogy in Four Parts. Pan Books Publisher, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.