Παραπομπή σε μορφή APA (7η εκδ.)

National Safety Council. (1956). Supervisors safety manual; better production without injury and waste from accidents. s.n.

Παραπομπή σε μορφή Chicago (17η εκδ.)

National Safety Council. Supervisors Safety Manual; Better Production Without Injury and Waste from Accidents. Chicago: s.n, 1956.

Παραπομπή σε μορφή MLA (9th εκδ.)

National Safety Council. Supervisors Safety Manual; Better Production Without Injury and Waste from Accidents. s.n, 1956.