APA
(1990). Manual of General Procedure. Kottayam: Rubber Research Institute of India.
Chicago
1990. Manual of General Procedure. Kottayam: Rubber Research Institute of India.
Harvard
(1990). Manual of General Procedure. Kottayam: Rubber Research Institute of India.
MLA
Manual of General Procedure. Kottayam: Rubber Research Institute of India. 1990.