Cita APA (7a ed.)

Keller, E. A. (2000). Environmental geology (8th ed.). Prentice-Hall.

Cita Chicago Style (17a ed.)

Keller, Edward A. Environmental Geology. 8th ed. Upper Saddle River, N.J.: Prentice-Hall, 2000.

Cita MLA (8a ed.)

Keller, Edward A. Environmental Geology. 8th ed. Prentice-Hall, 2000.