Cita APA (7th ed.)

De, K. K. (1966). A Text Book on Astronomy. Bookland.

Cita Chicago (17th ed.)

De, K. K. A Text Book on Astronomy. Calcutta: Bookland, 1966.

Cita MLA (9th ed.)

De, K. K. A Text Book on Astronomy. Bookland, 1966.