National Safety Council. (1956). Supervisors safety manual; better production without injury and waste from accidents. s.n.
Style de citation Chicago (17e éd.)National Safety Council. Supervisors Safety Manual; Better Production Without Injury and Waste from Accidents. Chicago: s.n, 1956.
Style de citation MLA (9e éd.)National Safety Council. Supervisors Safety Manual; Better Production Without Injury and Waste from Accidents. s.n, 1956.
Attention : ces citations peuvent ne pas être correctes à 100%.