APA (7th ed.) Citation

Keller, E. A., & Burt, E. M. (1979). Environmental geology (2d ed.). Merrill.

Chicago Style (17th ed.) Citation

Keller, Edward A., and E. M. Burt. Environmental Geology. 2d ed. Columbus: Merrill, 1979.

MLA (9th ed.) Citation

Keller, Edward A., and E. M. Burt. Environmental Geology. 2d ed. Merrill, 1979.