(1984). Safety at roadworks in urban areas: Site manual = Veiligheid by padwerke in stedelike gebiede : terreinhandleiding. Dept. of Transport for the National Transport Commission.
Chicago-referens (17:e uppl.)Safety at Roadworks in Urban Areas: Site Manual = Veiligheid by Padwerke in Stedelike Gebiede : Terreinhandleiding. Pretoria: Dept. of Transport for the National Transport Commission, 1984.
MLA-referens (8:e uppl.)Safety at Roadworks in Urban Areas: Site Manual = Veiligheid by Padwerke in Stedelike Gebiede : Terreinhandleiding. Dept. of Transport for the National Transport Commission, 1984.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.