APA (7th ed.) Citation

Hughes, G. A., & Whitmore, E. (1941). Salesmen built America. The Dartnell corporation.

Chicago Style (17th ed.) Citation

Hughes, George Alexander, and Eugene Whitmore. Salesmen Built America. Chicago, New York [etc.]: The Dartnell corporation, 1941.

MLA (9th ed.) Citation

Hughes, George Alexander, and Eugene Whitmore. Salesmen Built America. The Dartnell corporation, 1941.