APA
(1996). Rubber Productivity Directory. Kottayam: Rubber Research Institute of India.
Chicago
1996. Rubber Productivity Directory. Kottayam: Rubber Research Institute of India.
Harvard
(1996). Rubber Productivity Directory. Kottayam: Rubber Research Institute of India.
MLA
Rubber Productivity Directory. Kottayam: Rubber Research Institute of India. 1996.
