Lederer, R. J. (2016). Beaks, bones, and bird songs: How the struggle for survival has shaped birds and their behavior. Timber Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLederer, Roger J. Beaks, Bones, and Bird Songs: How the Struggle for Survival Has Shaped Birds and Their Behavior. Portland, Oregon: Timber Press, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLederer, Roger J. Beaks, Bones, and Bird Songs: How the Struggle for Survival Has Shaped Birds and Their Behavior. Timber Press, 2016.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.