APA (7 वां संस्करण) प्रशस्ति पत्र

(1976). Birds: Their life, their ways, their world. Harry N. Abrams, Inc.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Birds: Their Life, Their Ways, Their World. New York: Harry N. Abrams, Inc, 1976.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Birds: Their Life, Their Ways, Their World. Harry N. Abrams, Inc, 1976.

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