Washington State Highway Commission & Washington (State). Department of Highways. (1962). Historical markers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington State Highway Commission और Washington (State). Department of Highways. Historical Markers. [Olympia, 1962.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWashington State Highway Commission और Washington (State). Department of Highways. Historical Markers. 1962.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.