Sankara Pitchaiah. (1991). Water Ecology Pollution and Management. Chugh.
シカゴスタイル引用形Sankara Pitchaiah. Water Ecology Pollution and Management. India: Chugh, 1991.
MLA引用形式Sankara Pitchaiah. Water Ecology Pollution and Management. Chugh, 1991.
警告: この引用は必ずしも正確ではありません.