APA Edition Citation

Emmons, W. H. e. (1949). Geology: Principles and Processes. McGraw Hill Book Co.

Chicago Edition Citation

Emmons, William H. et.al. Geology: Principles and Processes. New York: McGraw Hill Book Co, 1949.

MLA Edition Citation

Emmons, William H. et.al. Geology: Principles and Processes. McGraw Hill Book Co, 1949.