Cita APA (7a ed.)

Plummer, C. (1985). Introduction to physical geology. Macmillan.

Cita Chicago Style (17a ed.)

Plummer, Charles. Introduction to Physical Geology. New York: Macmillan, 1985.

Cita MLA (9a ed.)

Plummer, Charles. Introduction to Physical Geology. Macmillan, 1985.