Cita APA (7th ed.)

Leet, L. D., & Judson, S. (1965). Physical geology (3a. ed.). Prentice-Hall.

Cita Chicago (17th ed.)

Leet, Lewis Don, i Sheldon Judson. Physical Geology. 3a. ed. Englewood Cliffs: Prentice-Hall, 1965.

Cita MLA (9th ed.)

Leet, Lewis Don, i Sheldon Judson. Physical Geology. 3a. ed. Prentice-Hall, 1965.