APA (7th ed.) Citation

Pratchett, T. (2005). Only you can save mankind. HarperCollins.

Chicago Style (17th ed.) Citation

Pratchett, Terry. Only You Can Save Mankind. New York: HarperCollins, 2005.

MLA (9th ed.) Citation

Pratchett, Terry. Only You Can Save Mankind. HarperCollins, 2005.

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