APA (7th ed.) Citation

Adams, D. (1984). So long, and thanks for all the fish: The hitch hiker's guide to the galaxy 4. Pan Books.

Chicago Style (17th ed.) Citation

Adams, Douglas. So Long, and Thanks for All the Fish: The Hitch Hiker's Guide to the Galaxy 4. London: Pan Books, 1984.

MLA (9th ed.) Citation

Adams, Douglas. So Long, and Thanks for All the Fish: The Hitch Hiker's Guide to the Galaxy 4. Pan Books, 1984.