APA (7th ed.) Citation

Adams, D. (1979). The hitchhiker's guide to the galaxy (Book club ed.). Harmony Books.

Chicago Style (17th ed.) Citation

Adams, Douglas. The Hitchhiker's Guide to the Galaxy. Book club ed. New York: Harmony Books, 1979.

MLA (9th ed.) Citation

Adams, Douglas. The Hitchhiker's Guide to the Galaxy. Book club ed. Harmony Books, 1979.