Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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

Attenzione: Queste citazioni potrebbero non essere precise al 100%.