Cita APA (7a ed.)

Pipkin, B. W., Trent, D. D., Hazlett, R., & Bierman, P. (2014). Geology and the environment (Seventh edition.). Brooks/Cole, CENGAGE Learning.

Cita Chicago Style (17a ed.)

Pipkin, Bernard W., D. D. Trent, Richard Hazlett, y Paul Bierman. Geology and the Environment. Seventh edition. Belmont, CA: Brooks/Cole, CENGAGE Learning, 2014.

Cita MLA (9a ed.)

Pipkin, Bernard W., et al. Geology and the Environment. Seventh edition. Brooks/Cole, CENGAGE Learning, 2014.