Washington State Planning Council & United States. National Park Service. (1939). A study of parks, parkways and recreational areas, state of Washington.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington State Planning Council और United States. National Park Service. A Study of Parks, Parkways and Recreational Areas, State of Washington. [Olympia], 1939.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWashington State Planning Council और United States. National Park Service. A Study of Parks, Parkways and Recreational Areas, State of Washington. 1939.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.