Cita APA

Judson, S., Kauffman, M. E., & Leet, L. D. (1987). Physical geology (7th ed.). Prentice-Hall.

Citación estilo Chicago

Judson, Sheldon, Marvin E. Kauffman, and L. Don Leet. Physical Geology. 7th ed. New Jersey: Prentice-Hall, 1987.

Cita MLA

Judson, Sheldon, et al. Physical Geology. 7th ed. Prentice-Hall, 1987.