APA (7th ed.) Citation

Merrill, F., & Merrill, M. (1931). Among the nudists. A. A. Knopf.

Chicago Style (17th ed.) Citation

Merrill, Frances, and Mason Merrill. Among the Nudists. New York, London: A. A. Knopf, 1931.

MLA (9th ed.) Citation

Merrill, Frances, and Mason Merrill. Among the Nudists. A. A. Knopf, 1931.