Washington (State). Department of Natural Resources & Washington Natural Heritage Program. (1983). State of Washington natural heritage plan. Washington Natural Heritage Program.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington (State). Department of Natural Resources और Washington Natural Heritage Program. State of Washington Natural Heritage Plan. [Olympia, WA]: Washington Natural Heritage Program, 1983.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWashington (State). Department of Natural Resources और Washington Natural Heritage Program. State of Washington Natural Heritage Plan. Washington Natural Heritage Program, 1983.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.