Washington (State). Division of Geology and Earth Resources & Stoffel, K. L. (1991). Geologic map of Washington, northeast quadrant. Washington Division of Geology and Earth Resources.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington (State). Division of Geology and Earth Resources और Keith L. Stoffel. Geologic Map of Washington, Northeast Quadrant. [Olympia, Wash.]: Washington Division of Geology and Earth Resources, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWashington (State). Division of Geology and Earth Resources और Keith L. Stoffel. Geologic Map of Washington, Northeast Quadrant. Washington Division of Geology and Earth Resources, 1991.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.