DENT, D., & YOUNG, A. (1981). Soil survey and land evaluation. Goerge Allen and Unwin.
Cita Chicago (17th ed.)DENT, David, i Anthony YOUNG. Soil Survey and Land Evaluation. London: Goerge Allen and Unwin, 1981.
Cita MLA (9th ed.)DENT, David, i Anthony YOUNG. Soil Survey and Land Evaluation. Goerge Allen and Unwin, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.