APA (7th ed.) Citation

Humphrey, S. K. (1917). Mankind: Racial values and the racial prospect. Scribner.

Chicago Style (17th ed.) Citation

Humphrey, Seth K. Mankind: Racial Values and the Racial Prospect. New York: Scribner, 1917.

MLA (9th ed.) Citation

Humphrey, Seth K. Mankind: Racial Values and the Racial Prospect. Scribner, 1917.