APA (7th ed.) Citation

Spencer, E. W. (1972). The dynamics of the earth: An introduction to physical geology. Crowell.

Chicago Style (17th ed.) Citation

Spencer, Edgar Winston. The Dynamics of the Earth: An Introduction to Physical Geology. New York: Crowell, 1972.

MLA (9th ed.) Citation

Spencer, Edgar Winston. The Dynamics of the Earth: An Introduction to Physical Geology. Crowell, 1972.

Warning: These citations may not always be 100% accurate.