Brady, N. C., & Buckman, H. O. (1974). The nature and properties of soils (8th ed.). Macmillan.
Cita Chicago (17th ed.)Brady, Nyle C., i Harry Oliver Buckman. The Nature and Properties of Soils. 8th ed. New York: Macmillan, 1974.
Cita MLA (9th ed.)Brady, Nyle C., i Harry Oliver Buckman. The Nature and Properties of Soils. 8th ed. Macmillan, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.