Não informado. Transportation noise bulletin. National Research Council, Highway Research Board.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Transportation Noise Bulletin. Washington: National Research Council, Highway Research Board.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Transportation Noise Bulletin. National Research Council, Highway Research Board.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.