APA (7th ed.) Citation

Harkness, D. E., & Ikeda, J. (2011). A discovery of witches: A novel. Penguin Audio.

Chicago Style (17th ed.) Citation

Harkness, Deborah E., and Jennifer Ikeda. A Discovery of Witches: A Novel. New York: Penguin Audio, 2011.

MLA (8th ed.) Citation

Harkness, Deborah E., and Jennifer Ikeda. A Discovery of Witches: A Novel. Penguin Audio, 2011.

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