APA (7th ed.) Citation

Pratchett, T. (1990). Guards! Guards! Corgi.

Chicago Style (17th ed.) Citation

Pratchett, Terry. Guards! Guards! London: Corgi, 1990.

MLA (9th ed.) Citation

Pratchett, Terry. Guards! Guards! Corgi, 1990.

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