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.
ציטוט MLAMorgan, Royston Philip Charles. Soil Erosion and Conservation. London: Longman, 1995.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.