Cita APA

Piplin, B. W., Pipkin, B., Trent, D., Hazlett, R., Bierman, P., & Pipkin, B. W. (2008). Geology and the environment (Fifth edition.). Thomson Brooks/Cole.

Citación estilo Chicago

Piplin, Bernard W., Bernard Pipkin, D.D Trent, Richard Hazlett, Paul Bierman, and Bernard W. Pipkin. Geology and the Environment. Fifth edition. Belmont, California: Thomson Brooks/Cole, 2008.

Cita MLA

Piplin, Bernard W., et al. Geology and the Environment. Fifth edition. Thomson Brooks/Cole, 2008.