National Cooperative Highway Research Program. (1982). NCHRP research on bridge engineering: An NCHRP staff digest of the progress and status of bridge engineering research under the National Cooperative Highway Research Program. Transportation Research Board, National Research Council.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Cooperative Highway Research Program. NCHRP Research on Bridge Engineering: An NCHRP Staff Digest of the Progress and Status of Bridge Engineering Research Under the National Cooperative Highway Research Program. Washington, D.C: Transportation Research Board, National Research Council, 1982.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNational Cooperative Highway Research Program. NCHRP Research on Bridge Engineering: An NCHRP Staff Digest of the Progress and Status of Bridge Engineering Research Under the National Cooperative Highway Research Program. Transportation Research Board, National Research Council, 1982.