APA (7th ed.) Citation

Thorp, W., Baker, C., & Curti, M. E. (1941). American issues .. J. P. Lippincott company.

Chicago Style (17th ed.) Citation

Thorp, Willard, Carlos Baker, and Merle Eugene Curti. American Issues .. Chicago: J. P. Lippincott company, 1941.

MLA (9th ed.) Citation

Thorp, Willard, et al. American Issues .. J. P. Lippincott company, 1941.