Hitchcock, C. L. (1955). Vascular plants of the Pacific Northwest. University of Washington Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHitchcock, C. Leo. Vascular Plants of the Pacific Northwest. Seattle: University of Washington Press, 1955.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHitchcock, C. Leo. Vascular Plants of the Pacific Northwest. University of Washington Press, 1955.
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