APA (7th ed.) Citation

Asimov, J., & Asimov, I. (1986). The Norby chronicles (Ace science fiction ed.). Berkley.

Chicago Style (17th ed.) Citation

Asimov, Janet, and Isaac Asimov. The Norby Chronicles. Ace science fiction ed. New York: Berkley, 1986.

MLA (9th ed.) Citation

Asimov, Janet, and Isaac Asimov. The Norby Chronicles. Ace science fiction ed. Berkley, 1986.