Singh, M. (2005). Environment and natural resources. satish serial publications.
シカゴスタイル引用形Singh, M.P. Environment and Natural Resources. Delhi: satish serial publications, 2005.
MLA引用形式Singh, M.P. Environment and Natural Resources. satish serial publications, 2005.
警告: この引用は必ずしも正確ではありません.