APA (7th ed.) Citation

Asimov, I., Greenberg, M. H., & Waugh, C. G. (1989). Robots. New American Library.

Chicago Style (17th ed.) Citation

Asimov, Isaac, Martin Harry Greenberg, and Charles G. Waugh. Robots. New York, N.Y.: New American Library, 1989.

MLA (9th ed.) Citation

Asimov, Isaac, et al. Robots. New American Library, 1989.