National Research Council (U.S.). Transportation Research Board. (1987). Progress report on maintenance and operations personnel. Transportation Research Board, National Research Council.
Chicago-referens (17:e uppl.)National Research Council (U.S.). Transportation Research Board. Progress Report on Maintenance and Operations Personnel. Washington, D.C: Transportation Research Board, National Research Council, 1987.
MLA-referens (9:e uppl.)National Research Council (U.S.). Transportation Research Board. Progress Report on Maintenance and Operations Personnel. Transportation Research Board, National Research Council, 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.