Cita APA (7th ed.)

LONGWELL, C. R. (1962). Introduction to physical geology. John Wiley.

Cita Chicago (17th ed.)

LONGWELL, Chester R. Introduction to Physical Geology. New York: John Wiley, 1962.

Cita MLA (9th ed.)

LONGWELL, Chester R. Introduction to Physical Geology. John Wiley, 1962.