APA (7th ed.) Citation

Steinem, G., Antupit, S., & Slackman, C. B. (1963). The beach book. Viking Press.

Chicago Style (17th ed.) Citation

Steinem, Gloria, Sam Antupit, and Charles B. Slackman. The Beach Book. New York: Viking Press, 1963.

MLA (9th ed.) Citation

Steinem, Gloria, et al. The Beach Book. Viking Press, 1963.