Não informado. (1948). Highway Engineer. Institution of Highway Engineers.
Chicago-Zitierstil (17. Ausg.)Não informado. Highway Engineer. London: Institution of Highway Engineers, 1948.
MLA-Zitierstil (8. Ausg.)Não informado. Highway Engineer. Institution of Highway Engineers, 1948.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.