MORGAN, R. (1979). Soil erosion: Topics in applied geography. Longman.
Chicagoスタイル(17版)引用形式MORGAN, R.P.C. Soil Erosion: Topics in Applied Geography. London: Longman, 1979.
MLA(9版)引用形式MORGAN, R.P.C. Soil Erosion: Topics in Applied Geography. Longman, 1979.
警告: この引用は必ずしも正確ではありません.