Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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