Burford, T. (2013). Apples of North America: 192 exceptional varieties for gardeners, growers, and cooks. Timber Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBurford, Tom. Apples of North America: 192 Exceptional Varieties for Gardeners, Growers, and Cooks. Portland, Or.: Timber Press, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBurford, Tom. Apples of North America: 192 Exceptional Varieties for Gardeners, Growers, and Cooks. Timber Press, 2013.
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