APA استشهاد

India. Office of the Registrar General. (1977). Census of India 1971 Series 9 Kerala. Director of Census Operations.

استشهاد بنمط شيكاغو

India. Office of the Registrar General. Census of India 1971 Series 9 Kerala. Kerala: Director of Census Operations, 1977.

MLA استشهاد

India. Office of the Registrar General. Census of India 1971 Series 9 Kerala. Director of Census Operations, 1977.