APA-viite (7. p.)

Keller, E. A. (2008). Introduction to environmental geology (5th custom edition.). Pearson Prentice-Hall.

Chicago-viite (17. p.)

Keller, Edward A. Introduction to Environmental Geology. 5th custom edition. Upper Saddle River, N.J: Pearson Prentice-Hall, 2008.

MLA-viite (9. p.)

Keller, Edward A. Introduction to Environmental Geology. 5th custom edition. Pearson Prentice-Hall, 2008.