APA (7th ed.) Citation

Whitehead, F. (1992). Freethought on the American frontier. Prometheus Books.

Chicago Style (17th ed.) Citation

Whitehead, Fred. Freethought on the American Frontier. Buffalo, NY: Prometheus Books, 1992.

MLA (8th ed.) Citation

Whitehead, Fred. Freethought on the American Frontier. Prometheus Books, 1992.