Morgan, R. P. C. (1995). Soil erosion and conservation. London: Longman.
Chicago Style CitationMorgan, Royston Philip Charles. Soil Erosion and Conservation. London: Longman, 1995.
Cita MLAMorgan, Royston Philip Charles. Soil Erosion and Conservation. London: Longman, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.