Não informado. (1942). Machine tools. National Machine Tool Builders Association.
Chicagoスタイル(17版)引用形式Não informado. Machine Tools. Cleveland, Ohio: National Machine Tool Builders Association, 1942.
MLA(8版)引用形式Não informado. Machine Tools. National Machine Tool Builders Association, 1942.
警告: この引用は必ずしも正確ではありません.