Adams Douglas. (1992). Hitch Hiker's guide to the galaxy: A trilogy in four parts. Pan Books Publisher.
Citazione stile Chigago Style (17a edizione)Adams Douglas. Hitch Hiker's Guide to the Galaxy: A Trilogy in Four Parts. London: Pan Books Publisher, 1992.
Citatione MLA (9a ed.)Adams Douglas. Hitch Hiker's Guide to the Galaxy: A Trilogy in Four Parts. Pan Books Publisher, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.