Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

Census 1971. Director of Census Operations, 1977.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.