APA (7th ed.) Citation

Asimov, I. (1985). Asimov's Guide to Halley's comet. Walker.

Chicago Style (17th ed.) Citation

Asimov, Isaac. Asimov's Guide to Halley's Comet. New York: Walker, 1985.

MLA (9th ed.) Citation

Asimov, Isaac. Asimov's Guide to Halley's Comet. Walker, 1985.

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