Cita APA

Lutgens, F. K., & Tarbuck, E. J. (2015). Essentials of geology (Twelfth edition.). Pearson.

Chicago Edition Citation

Lutgens, Frederick K., i Edward J. Tarbuck. Essentials of Geology. Twelfth edition. Boston: Pearson, 2015.

Cita MLA

Lutgens, Frederick K., i Edward J. Tarbuck. Essentials of Geology. Twelfth edition. Pearson, 2015.