Tregenza, G. A. (1973). Bibliography of cracking clay soils. Soil Conservation Service, Dept. of Conservation.
Cita Chicago (17th ed.)Tregenza, G. A. Bibliography of Cracking Clay Soils. [Sydney]: Soil Conservation Service, Dept. of Conservation, 1973.
Cita MLA (8th ed.)Tregenza, G. A. Bibliography of Cracking Clay Soils. Soil Conservation Service, Dept. of Conservation, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.