APA (7th ed.) Citation

Emmons, W. H. (1955). Geology: Principles and processes (4th ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Emmons, William H. Geology: Principles and Processes. 4th ed. New York: McGraw-Hill, 1955.

MLA (9th ed.) Citation

Emmons, William H. Geology: Principles and Processes. 4th ed. McGraw-Hill, 1955.