APA aipamena

Manoharan, T., & Biju, S. N. (1999). Silent valley: Whispers of reason. Kerala Forest Department.

Chicago Style aipamena

Manoharan, T.M, and S.D. Nayar Biju. Silent Valley: Whispers of Reason. Thiruvananthapuram: Kerala Forest Department, 1999.

MLA aipamena

Manoharan, T.M, and S.D. Nayar Biju. Silent Valley: Whispers of Reason. Kerala Forest Department, 1999.