APA (7th ed.) Citation

Whitbeck, R. H., Williams, F. E., & Christians, W. F. (1940). Economic geography of South America. McGraw-Hill.

Chicago Style (17th ed.) Citation

Whitbeck, Ray Hughes, Frank Ernest Williams, and William Florian Christians. Economic Geography of South America. New York: McGraw-Hill, 1940.

MLA (9th ed.) Citation

Whitbeck, Ray Hughes, et al. Economic Geography of South America. McGraw-Hill, 1940.