APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Cumming, William Patterson, et al. The Discovery of North America. 1. American ed. American Heritage Pr, 1972.