Adams Douglas. (1992). Hitch Hiker's guide to the galaxy: A trilogy in four parts. Pan Books Publisher.
Chicago-viite (17. p.)Adams Douglas. Hitch Hiker's Guide to the Galaxy: A Trilogy in Four Parts. London: Pan Books Publisher, 1992.
MLA-viite (9. p.)Adams Douglas. Hitch Hiker's Guide to the Galaxy: A Trilogy in Four Parts. Pan Books Publisher, 1992.
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