Não informado. (1977). American transportation builder. American Road Builders Association.
Chicago-Zitierstil (17. Ausg.)Não informado. American Transportation Builder. Washington: American Road Builders Association, 1977.
MLA-Zitierstil (8. Ausg.)Não informado. American Transportation Builder. American Road Builders Association, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.