APA Citation

K.K.De. (1980). A text book on astronomy. Calcutta: Book Syndicate.

Chicago Style Citation

K.K.De. A Text Book On Astronomy. Calcutta: Book Syndicate, 1980.

MLA Citation

K.K.De. A Text Book On Astronomy. Calcutta: Book Syndicate, 1980.

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