APA (7th ed.) Citation

Cumming, W. P., Skelton, R. A., & Quinn, D. B. (1972). The discovery of North America ([1st American ed.].). American Heritage Press.

Chicago Style (17th ed.) Citation

Cumming, William Patterson, R. A. Skelton, and David B. Quinn. The Discovery of North America. [1st American ed.]. New York: American Heritage Press, 1972.

MLA (9th ed.) Citation

Cumming, William Patterson, et al. The Discovery of North America. [1st American ed.]. American Heritage Press, 1972.