APA (7th ed.) Citation

Keller, E. A. (1982). Environmental geology (3rd ed.). Merrill.

Chicago Style (17th ed.) Citation

Keller, Edward A. Environmental Geology. 3rd ed. Columbus: Merrill, 1982.

MLA (9th ed.) Citation

Keller, Edward A. Environmental Geology. 3rd ed. Merrill, 1982.