Não informado. (1926). General contracting. Engineering and Contracting Publishing.
Chicagoスタイル(17版)引用形式Não informado. General Contracting. Chicago, Ill: Engineering and Contracting Publishing, 1926.
MLA(8版)引用形式Não informado. General Contracting. Engineering and Contracting Publishing, 1926.
警告: この引用は必ずしも正確ではありません.