APA
(1972). Rubber Board Staff Association 12th Annual Conference. Kottayam: Rubber Research Institute of India.
Chicago
1972. Rubber Board Staff Association 12th Annual Conference. Kottayam: Rubber Research Institute of India.
Harvard
(1972). Rubber Board Staff Association 12th Annual Conference. Kottayam: Rubber Research Institute of India.
MLA
Rubber Board Staff Association 12th Annual Conference. Kottayam: Rubber Research Institute of India. 1972.
