APA (7th ed.) Citation

Knowlton, D. C., & Gerson, A. J. (1933). Our beginnings in the past: A first book in history. American book company.

Chicago Style (17th ed.) Citation

Knowlton, Daniel C., and Armand Jacques Gerson. Our Beginnings in the Past: A First Book in History. New York, Cincinnati [etc.]: American book company, 1933.

MLA (9th ed.) Citation

Knowlton, Daniel C., and Armand Jacques Gerson. Our Beginnings in the Past: A First Book in History. American book company, 1933.