Pinkney, J., & Asbjørnsen, P. C. (2017). The three billy goats Gruff (First edition.). Little, Brown and Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPinkney, Jerry, और Peter Christen Asbjørnsen. The Three Billy Goats Gruff. First edition. New York: Little, Brown and Company, 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPinkney, Jerry, और Peter Christen Asbjørnsen. The Three Billy Goats Gruff. First edition. Little, Brown and Company, 2017.
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