Cita APA (7th ed.)

Kotpal, R. L. (1999). The Birds: A Text Book for University Students (4th ed.). Rastogi Publications.

Cita Chicago (17th ed.)

Kotpal, R. L. The Birds: A Text Book for University Students. 4th ed. Meerut, India: Rastogi Publications, 1999.

Cita MLA (9th ed.)

Kotpal, R. L. The Birds: A Text Book for University Students. 4th ed. Rastogi Publications, 1999.