Chernicoff, S., & Fox, H. A. (2003). Essentials of geology (3rd ed.). Houghton Mifflin.
Cita Chicago (17th ed.)Chernicoff, Stanley, i Haydn A. Fox. Essentials of Geology. 3rd ed. Boston: Houghton Mifflin, 2003.
Cita MLA (9th ed.)Chernicoff, Stanley, i Haydn A. Fox. Essentials of Geology. 3rd ed. Houghton Mifflin, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.