Forkner, A. (2015). A-Z of bird portraits: An illustrated guide to painting beautiful birds in acrylics. Search Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रForkner, Andrew. A-Z of Bird Portraits: An Illustrated Guide to Painting Beautiful Birds in Acrylics. Tunbridge Wells, Kent: Search Press, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रForkner, Andrew. A-Z of Bird Portraits: An Illustrated Guide to Painting Beautiful Birds in Acrylics. Search Press, 2015.
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