APA (7e ed.) Bronvermelding

Lutgens, F. K., & Tarbuck, E. J. (2011). Essentials of geology (11th ed.). Prentice Hall.

Chicago (17e ed.) Bronvermelding

Lutgens, Frederick K., en Edward J. Tarbuck. Essentials of Geology. 11th ed. Upper Saddle River, N.J: Prentice Hall, 2011.

MLA (9e ed.) Bronvermelding

Lutgens, Frederick K., en Edward J. Tarbuck. Essentials of Geology. 11th ed. Prentice Hall, 2011.