APA (7th ed.) Citation

Doughlas Adams. (1979). The Hitchhiker's Guide to the Galaxy. Pan Books.

Chicago Style (17th ed.) Citation

Doughlas Adams. The Hitchhiker's Guide to the Galaxy. London: Pan Books, 1979.

MLA (9th ed.) Citation

Doughlas Adams. The Hitchhiker's Guide to the Galaxy. Pan Books, 1979.