Washington Natural Heritage Program. Endangered, threatened and sensitive vascular plants of Washington. Washington Natural Heritage Program.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington Natural Heritage Program. Endangered, Threatened and Sensitive Vascular Plants of Washington. [Olympia, Wash.]: Washington Natural Heritage Program.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWashington Natural Heritage Program. Endangered, Threatened and Sensitive Vascular Plants of Washington. Washington Natural Heritage Program.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.