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Cita Chicago Style (17a ed.)National Research Council (U.S.). Transportation Research Board. Committee on Maintenance and Operations Personnel y 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 MLA (9a ed.)National Research Council (U.S.). Transportation Research Board. Committee on Maintenance and Operations Personnel y 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.