National Research Council (U.S.). Highway Research Board. (1961). Night visibility, 1961: Presented at the 40th annual meeting, January 9-13, 1961. National Academy of Sciences, National Research Council.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Research Council (U.S.). Highway Research Board. Night Visibility, 1961: Presented at the 40th Annual Meeting, January 9-13, 1961. Washington, D.C: National Academy of Sciences, National Research Council, 1961.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNational Research Council (U.S.). Highway Research Board. Night Visibility, 1961: Presented at the 40th Annual Meeting, January 9-13, 1961. National Academy of Sciences, National Research Council, 1961.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.