APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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