National Research Council (U.S.). Transportation Research Board. Committee on Maintenance and Operations Personnel & American Association of State Highway and Transportation Officials. Subcommittee on Maintenance. (1986). Progress report on maintenance and operations personnel. Transportation Research Board, National Academy of Sciences.
Citación estilo ChicagoNational Research Council (U.S.). Transportation Research Board. Committee on Maintenance and Operations Personnel and American Association of State Highway and Transportation Officials. Subcommittee on Maintenance. Progress Report on Maintenance and Operations Personnel. Washington, D.C: Transportation Research Board, National Academy of Sciences, 1986.
Cita MLANational Research Council (U.S.). Transportation Research Board. Committee on Maintenance and Operations Personnel and American Association of State Highway and Transportation Officials. Subcommittee on Maintenance. Progress Report on Maintenance and Operations Personnel. Transportation Research Board, National Academy of Sciences, 1986.