APA (7th ed.) Citation

Briefs, G. A., & Eckhart, R. A. (1937). The proletariat: A challenge to western civilization. McGraw-Hill.

Chicago Style (17th ed.) Citation

Briefs, Goetz A., and Ruth Alma Eckhart. The Proletariat: A Challenge to Western Civilization. New York, London: McGraw-Hill, 1937.

MLA (9th ed.) Citation

Briefs, Goetz A., and Ruth Alma Eckhart. The Proletariat: A Challenge to Western Civilization. McGraw-Hill, 1937.