Manoharan, T. (1999). Silent valley- whispers of reason. Kerala Forest Department.
シカゴスタイル引用形Manoharan, T.M. Silent Valley- Whispers of Reason. Thiruvananthapuram: Kerala Forest Department, 1999.
MLA引用形式Manoharan, T.M. Silent Valley- Whispers of Reason. Kerala Forest Department, 1999.
警告: この引用は必ずしも正確ではありません.