Citazione Stile APA (7a Edizione)

Pipkin, B. W., & Trent, D. D. (2000). Geology and the environment (3rd ed.). Brooks/Cole.

Citazione stile Chigago Style (17a edizione)

Pipkin, Bernard W., e D. D. Trent. Geology and the Environment. 3rd ed. Pacific Grove, CA: Brooks/Cole, 2000.

Citatione MLA (9a ed.)

Pipkin, Bernard W., e D. D. Trent. Geology and the Environment. 3rd ed. Brooks/Cole, 2000.