Morgan, R. P. C. (1998). Soil erosion and conservation. (2nd ed.). Longman.
Chicagoスタイル(17版)引用形式Morgan, R.P.C(Royston Philip Charles). Soil Erosion and Conservation. 2nd ed. Essex: Longman, 1998.
MLA(9版)引用形式Morgan, R.P.C(Royston Philip Charles). Soil Erosion and Conservation. 2nd ed. Longman, 1998.
警告: この引用は必ずしも正確ではありません.