Não informado. (1957). American road builder. American Road Builders Association.
Chicagoスタイル(17版)引用形式Não informado. American Road Builder. Washington: American Road Builders Association, 1957.
MLA(8版)引用形式Não informado. American Road Builder. American Road Builders Association, 1957.
警告: この引用は必ずしも正確ではありません.