HRB-AASHO Joint Committee on Maintenance and Operations Personnel & National Research Council (U.S.). Highway Research Board. Progress report of HRB-AASHO Joint Committee on Maintenance and Operations Personnel. Highway Research Board.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHRB-AASHO Joint Committee on Maintenance and Operations Personnel और National Research Council (U.S.). Highway Research Board. Progress Report of HRB-AASHO Joint Committee on Maintenance and Operations Personnel. Washington, D.C: Highway Research Board.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHRB-AASHO Joint Committee on Maintenance and Operations Personnel और National Research Council (U.S.). Highway Research Board. Progress Report of HRB-AASHO Joint Committee on Maintenance and Operations Personnel. Highway Research Board.