APA
Adams D., . (1979). Hitch Hiker's Guide to the Galaxy. London: Pan Books.
Chicago
Adams Douglas, . 1979. Hitch Hiker's Guide to the Galaxy. London: Pan Books.
Harvard
Adams D., . (1979). Hitch Hiker's Guide to the Galaxy. London: Pan Books.
MLA
Adams Douglas, . Hitch Hiker's Guide to the Galaxy. London: Pan Books. 1979.