APA (7th ed.) Citation

Asimov, I., & SILVERBERG, R. (1990). Nightfall. Victor Gollancz.

Chicago Style (17th ed.) Citation

Asimov, Isaac, and Robert SILVERBERG. Nightfall. London: Victor Gollancz, 1990.

MLA (9th ed.) Citation

Asimov, Isaac, and Robert SILVERBERG. Nightfall. Victor Gollancz, 1990.

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