APA (7th ed.) Citation

Goodkind, T. (2011). The omen machine: Terry Goodkind. A Tor Book.

Chicago Style (17th ed.) Citation

Goodkind, Terry. The Omen Machine: Terry Goodkind. New York: A Tor Book, 2011.

MLA (9th ed.) Citation

Goodkind, Terry. The Omen Machine: Terry Goodkind. A Tor Book, 2011.

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