APA Citation

De, K. (1972). Elements of astronomy (4th ed.). Calcutta: Book Syndicate.

Chicago Style Citation

De, K.K. Elements of Astronomy. 4th ed. Calcutta: Book Syndicate, 1972.

MLA Citation

De, K.K. Elements of Astronomy. 4th ed. Calcutta: Book Syndicate, 1972.

Warning: These citations may not always be 100% accurate.