(1976). Birds: Their life, their ways, their world. Harry N. Abrams, Inc.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBirds: Their Life, Their Ways, Their World. New York: Harry N. Abrams, Inc, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBirds: Their Life, Their Ways, Their World. Harry N. Abrams, Inc, 1976.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.