Pitchaiah, P. S. (1991). Water ecology pollution and management. Chugh Publications.
Chicagoスタイル(17版)引用形式Pitchaiah, P. Sankara. Water Ecology Pollution and Management. Allahabad: Chugh Publications, 1991.
MLA(9版)引用形式Pitchaiah, P. Sankara. Water Ecology Pollution and Management. Chugh Publications, 1991.
警告: この引用は必ずしも正確ではありません.