Prudham, W. S. (2005). Knock on wood: Nature as commodity in Douglas fir country. Routledge.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPrudham, W. Scott. Knock on Wood: Nature as Commodity in Douglas Fir Country. New York: Routledge, 2005.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPrudham, W. Scott. Knock on Wood: Nature as Commodity in Douglas Fir Country. Routledge, 2005.
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