APA (7th ed.) Citation

Pratchett, T. (1988). Wyrd sisters ([Book club ed.].). Penguin Books.

Chicago Style (17th ed.) Citation

Pratchett, Terry. Wyrd Sisters. [Book club ed.]. New York: Penguin Books, 1988.

MLA (9th ed.) Citation

Pratchett, Terry. Wyrd Sisters. [Book club ed.]. Penguin Books, 1988.