Underhill, J. E. (1981). Roadside wildflowers of the Northwest. Hancock House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnderhill, J. E. Roadside Wildflowers of the Northwest. Vancouver, B.C. ; Blaine, Wash.: Hancock House, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnderhill, J. E. Roadside Wildflowers of the Northwest. Hancock House, 1981.
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