एपीए उद्धरण

(1997). The great book of birds: The comprehensive illustrated guide to 600 species and their environments. Philadelphia, Pennsylvania: Courage Books.

शिकागो स्टाइल उद्धरण

The Great Book of Birds: The Comprehensive Illustrated Guide to 600 Species and Their Environments. Philadelphia, Pennsylvania: Courage Books, 1997.

एमएलए उद्धरण

The Great Book of Birds: The Comprehensive Illustrated Guide to 600 Species and Their Environments. Philadelphia, Pennsylvania: Courage Books, 1997.