APA সাইটেশন

Director of Census Operations. (1977). Census 1971. Director of Census Operations.

শিকাগো স্টাইলে সাইটেশন

Director of Census Operations. Census 1971. Trivandrum: Director of Census Operations, 1977.

এমএলএ সাইটেশন

Director of Census Operations. Census 1971. Director of Census Operations, 1977.