APA
Directorate of Extension, . (1971). Summary record. Ministry of food & agriculture, New Delhi: .
Chicago
Directorate of Extension, . 1971. Summary record. Ministry of food & agriculture, New Delhi: .
Harvard
Directorate of Extension, . (1971). Summary record. Ministry of food & agriculture, New Delhi: .
MLA
Directorate of Extension, . Summary record. Ministry of food & agriculture, New Delhi: . 1971.