Joffe, J. S. (1949). Pedology (2nd ed.). Pedology Publications.
Cita Chicago (17th ed.)Joffe, Jacob Samuel. Pedology. 2nd ed. New Brunswick, N.J: Pedology Publications, 1949.
Cita MLA (9th ed.)Joffe, Jacob Samuel. Pedology. 2nd ed. Pedology Publications, 1949.
Atenció: Aquestes cites poden no estar 100% correctes.