Rush, T., Gamon, J., & Ponzetti, J. (1999). Field guide to Washington's rare plants. Washington State Dept. of Natural Resources ; Spokane District, Bureau of Land Management.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRush, Tracy, John Gamon, और Jeanne Ponzetti. Field Guide to Washington's Rare Plants. [Olympia] : [Spokane]: Washington State Dept. of Natural Resources ; Spokane District, Bureau of Land Management, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRush, Tracy, et al. Field Guide to Washington's Rare Plants. Washington State Dept. of Natural Resources ; Spokane District, Bureau of Land Management, 1999.
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