APA (7th ed.) Citation

Keller, E. A., & Burt, E. M. (1976). Environmental geology. Merrill.

Chicago Style (17th ed.) Citation

Keller, Edward A., and E. M. Burt. Environmental Geology. Columbus, Ohio: Merrill, 1976.

MLA (8th ed.) Citation

Keller, Edward A., and E. M. Burt. Environmental Geology. Merrill, 1976.