APA (7th ed.) Citation

Lutgens, F. K., & Tarbuck, E. J. (1989). Essentials of geology (3rd ed.). Merrill Pub. Co.

Chicago Style (17th ed.) Citation

Lutgens, Frederick K., and Edward J. Tarbuck. Essentials of Geology. 3rd ed. Columbus: Merrill Pub. Co, 1989.

MLA (9th ed.) Citation

Lutgens, Frederick K., and Edward J. Tarbuck. Essentials of Geology. 3rd ed. Merrill Pub. Co, 1989.