APA (7th ed.) Citation

Le Guin, U. K., & Kidd, V. (1980). Interfaces. Ace Books.

Chicago Style (17th ed.) Citation

Le Guin, Ursula K., and Virginia Kidd. Interfaces. New York, N.Y.: Ace Books, 1980.

MLA (9th ed.) Citation

Le Guin, Ursula K., and Virginia Kidd. Interfaces. Ace Books, 1980.