APA (7th ed.) Citation

Knowlton, D. C., & Wheeler, M. A. (1933). Our past in western Europe: A second book in history. American book company.

Chicago Style (17th ed.) Citation

Knowlton, Daniel C., and Mary Alexandria Wheeler. Our Past in Western Europe: A Second Book in History. New York, Cincinnati [etc.]: American book company, 1933.

MLA (9th ed.) Citation

Knowlton, Daniel C., and Mary Alexandria Wheeler. Our Past in Western Europe: A Second Book in History. American book company, 1933.