APA Edition Citation

Asimov, I., & Silverberg, R. (1991). Nightfall. Bantam books.

Chicago Edition Citation

Asimov, Issac, and Robert Silverberg. Nightfall. Newyork: Bantam books, 1991.

MLA Edition Citation

Asimov, Issac, and Robert Silverberg. Nightfall. Bantam books, 1991.

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