Trivedi, P. R. (1998). Encyclopaedia of environment, pollution , planning and conservation. A.P.H.
シカゴスタイル引用形Trivedi, P. R. Encyclopaedia of Environment, Pollution , Planning and Conservation. New Delhi: A.P.H, 1998.
MLA引用形式Trivedi, P. R. Encyclopaedia of Environment, Pollution , Planning and Conservation. A.P.H, 1998.
警告: この引用は必ずしも正確ではありません.