Não informado. (1929). Machine Design: As it affects engineering, production, sales. Penton Publishing.
Chicagoスタイル(17版)引用形式Não informado. Machine Design: As It Affects Engineering, Production, Sales. Cleveland, Ohio: Penton Publishing, 1929.
MLA(8版)引用形式Não informado. Machine Design: As It Affects Engineering, Production, Sales. Penton Publishing, 1929.
警告: この引用は必ずしも正確ではありません.