Παραπομπή σε μορφή APA (7η εκδ.)

United States. Soil Conservation Service. Soil Survey Staff. (1960). Soil classification: A comprehensive system (7th approximation.). Soil Survey Staff, Soil Conservation Service, U.S. Dept. of Agriculture.

Παραπομπή σε μορφή Chicago (17η εκδ.)

United States. Soil Conservation Service. Soil Survey Staff. Soil Classification: A Comprehensive System. 7th approximation. [Washington, D.C.]: Soil Survey Staff, Soil Conservation Service, U.S. Dept. of Agriculture, 1960.

Παραπομπή σε μορφή MLA (8th εκδ.)

United States. Soil Conservation Service. Soil Survey Staff. Soil Classification: A Comprehensive System. 7th approximation. Soil Survey Staff, Soil Conservation Service, U.S. Dept. of Agriculture, 1960.