APA Edition Citation

Douglas Adams. (2002). Ultimate Hitchhiker's guide to the galaxy. Ballantine Books.

Chicago Edition Citation

Douglas Adams. Ultimate Hitchhiker's Guide to the Galaxy. New York: Ballantine Books, 2002.

MLA Edition Citation

Douglas Adams. Ultimate Hitchhiker's Guide to the Galaxy. Ballantine Books, 2002.

Warning: These citations may not always be 100% accurate.