Heinrich, B. (2016). One wild bird at a time: Portraits of individual lives. Houghton Mifflin Harcourt.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHeinrich, Bernd. One Wild Bird at a Time: Portraits of Individual Lives. Boston: Houghton Mifflin Harcourt, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHeinrich, Bernd. One Wild Bird at a Time: Portraits of Individual Lives. Houghton Mifflin Harcourt, 2016.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.