Houston, G., & Cooney, B. (1988). The year of the perfect Christmas tree: An Appalachian story. Dial Books for Young Readers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHouston, Gloria, और Barbara Cooney. The Year of the Perfect Christmas Tree: An Appalachian Story. New York: Dial Books for Young Readers, 1988.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHouston, Gloria, और Barbara Cooney. The Year of the Perfect Christmas Tree: An Appalachian Story. Dial Books for Young Readers, 1988.
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