APA-referens (7:e uppl.)

National Institute of Education (India). Educational Survey Unit. (1969). Intensive study of blocks, 1968.

Chicago-referens (17:e uppl.)

National Institute of Education (India). Educational Survey Unit. Intensive Study of Blocks, 1968. New Delhi, 1969.

MLA-referens (8:e uppl.)

National Institute of Education (India). Educational Survey Unit. Intensive Study of Blocks, 1968. 1969.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.