Johnson, J. D. (2009). Plants of the western forest: Boreal and aspen parkland. Lone Pine Pub..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohnson, J. D. Plants of the Western Forest: Boreal and Aspen Parkland. Auburn, Wash.: Lone Pine Pub., 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रJohnson, J. D. Plants of the Western Forest: Boreal and Aspen Parkland. Lone Pine Pub., 2009.
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