APA
(1989). First National Seminar on Rubber Wood, 12 December 1989, Kottayam, India. Kottayam: Rubber Research Institute of India.
Chicago
1989. First National Seminar on Rubber Wood, 12 December 1989, Kottayam, India. Kottayam: Rubber Research Institute of India.
Harvard
(1989). First National Seminar on Rubber Wood, 12 December 1989, Kottayam, India. Kottayam: Rubber Research Institute of India.
MLA
First National Seminar on Rubber Wood, 12 December 1989, Kottayam, India. Kottayam: Rubber Research Institute of India. 1989.
