Morgan, R. P. C. (1995). Soil erosion and conservation. London: Longman.
Trích dẫn kiểu ChicagoMorgan, Royston Philip Charles. Soil Erosion and Conservation. London: Longman, 1995.
MLA引文Morgan, Royston Philip Charles. Soil Erosion and Conservation. London: Longman, 1995.
警告:这些引文格式不一定是100%准确.