APA (7th ed.) Citation

Asimov, I., Greenberg, M. H., & Waugh, C. G. (1986). Mythical beasties. New American Library.

Chicago Style (17th ed.) Citation

Asimov, Isaac, Martin Harry Greenberg, and Charles G. Waugh. Mythical Beasties. New York: New American Library, 1986.

MLA (9th ed.) Citation

Asimov, Isaac, et al. Mythical Beasties. New American Library, 1986.