Duggal, K. (1996). Elements of environmental engineering (6th ed.). S.Chand & Co.
シカゴスタイル引用形Duggal, K.N. Elements of Environmental Engineering. 6th ed. New Delhi: S.Chand & Co, 1996.
MLA引用形式Duggal, K.N. Elements of Environmental Engineering. 6th ed. S.Chand & Co, 1996.
警告: この引用は必ずしも正確ではありません.