Zumberge, J. H. (1972). Elements of geology. Wiley.
Cita Chicago (17th ed.)Zumberge, James Herbert. Elements of Geology. New York: Wiley, 1972.
Cita MLA (9th ed.)Zumberge, James Herbert. Elements of Geology. Wiley, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.