Não informado. (1942). Machine tools. National Machine Tool Builders Association.
Style de citation Chicago (17e éd.)Não informado. Machine Tools. Cleveland, Ohio: National Machine Tool Builders Association, 1942.
Style de citation MLA (8e éd.)Não informado. Machine Tools. National Machine Tool Builders Association, 1942.
Attention : ces citations peuvent ne pas être correctes à 100%.