(1930). Official United States Tourist Service Highway Map of Washington. United States Tourist Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOfficial United States Tourist Service Highway Map of Washington. [S.I.]: United States Tourist Service, 1930.
एमएलए (8वां संस्करण) प्रशस्ति पत्रOfficial United States Tourist Service Highway Map of Washington. United States Tourist Service, 1930.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.