APA
(1961). Annual report of extension services centres. New Delhi, India: National Council of Educational Research and Training.
Chicago
1961. Annual report of extension services centres. New Delhi, India: National Council of Educational Research and Training.
Harvard
(1961). Annual report of extension services centres. New Delhi, India: National Council of Educational Research and Training.
MLA
Annual report of extension services centres. New Delhi, India: National Council of Educational Research and Training. 1961.