APA (7th ed.) Citation

Pratchett, T. (1988). Wyrd systems. Corgi Books.

Chicago Style (17th ed.) Citation

Pratchett, Terry. Wyrd Systems. London: Corgi Books, 1988.

MLA (8th ed.) Citation

Pratchett, Terry. Wyrd Systems. Corgi Books, 1988.

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