APA
(1980). Guide to the Central Experiment Station, Chethackal, Ranni. Kottayam: Rubber Research Institute of India.
Chicago
1980. Guide to the Central Experiment Station, Chethackal, Ranni. Kottayam: Rubber Research Institute of India.
Harvard
(1980). Guide to the Central Experiment Station, Chethackal, Ranni. Kottayam: Rubber Research Institute of India.
MLA
Guide to the Central Experiment Station, Chethackal, Ranni. Kottayam: Rubber Research Institute of India. 1980.
