APA引文

India. Director of Census Operations, Delhi. (1991). Census of India, 1991. s.n.].

Chicago Style (17th ed.) Citation

India. Director of Census Operations, Delhi. Census of India, 1991. [Delhi: s.n.], 1991.

MLA引文

India. Director of Census Operations, Delhi. Census of India, 1991. s.n.], 1991.