APA aipamena

Manoharan, T. M. (1999). Silent valley whispers of reason. Kerala forest department.

Chicago Style aipamena

Manoharan, T M. Silent Valley Whispers of Reason. Thiruvanthapuram: Kerala forest department, 1999.

MLA aipamena

Manoharan, T M. Silent Valley Whispers of Reason. Kerala forest department, 1999.