APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

Leet, L. Don, en Sheldon Judson. Physical Geology. 3d ed. Englewood Cliffs, N.J: Prentice-Hall, 1965.

MLA (9e ed.) Bronvermelding

Leet, L. Don, en Sheldon Judson. Physical Geology. 3d ed. Prentice-Hall, 1965.