Thompson, L. M., & Troeh, F. R. (1978). Soils and soil fertility (4th ed.). Tata McGraw-Hill Publishing Co. Ltd..
Cita Chicago (17th ed.)Thompson, Louis M., i Frederick R. Troeh. Soils and Soil Fertility. 4th ed. New Delhi: Tata McGraw-Hill Publishing Co. Ltd., 1978.
Cita MLA (9th ed.)Thompson, Louis M., i Frederick R. Troeh. Soils and Soil Fertility. 4th ed. Tata McGraw-Hill Publishing Co. Ltd., 1978.
Atenció: Aquestes cites poden no estar 100% correctes.