(1997). The great book of birds: The comprehensive illustrated guide to 600 species and their environments. Philadelphia, Pennsylvania: Courage Books.
استشهاد بنمط شيكاغوThe Great Book of Birds: The Comprehensive Illustrated Guide to 600 Species and Their Environments. Philadelphia, Pennsylvania: Courage Books, 1997.
MLA استشهادThe Great Book of Birds: The Comprehensive Illustrated Guide to 600 Species and Their Environments. Philadelphia, Pennsylvania: Courage Books, 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.