Cita APA (7th ed.)
Leet, L. D., & Judson, S. (1965). Physical geology (2nd ed.). Prentice-Hall.
Cita Chicago (17th ed.)
Leet, L. Don, i Sheldon Judson. Physical Geology. 2nd ed. New York: Prentice-Hall, 1965.
Cita MLA (9th ed.)
Leet, L. Don, i Sheldon Judson. Physical Geology. 2nd ed. Prentice-Hall, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.