Northrup, H. R., Rowan, R. L., & Perry, C. R. (1978). The impact of OSHA: A study of the effects of the Occupational safety and health act on three key industries, aerospace, chemicals, and textiles. Industrial Research Unit, Wharton School, University of Pennsylvania.
Chicago Style aipamenaNorthrup, Herbert R., Richard L. Rowan, and Charles R. Perry. The Impact of OSHA: A Study of the Effects of the Occupational Safety and Health Act on Three Key Industries, Aerospace, Chemicals, and Textiles. Philadelphia: Industrial Research Unit, Wharton School, University of Pennsylvania, 1978.
MLA aipamenaNorthrup, Herbert R., et al. The Impact of OSHA: A Study of the Effects of the Occupational Safety and Health Act on Three Key Industries, Aerospace, Chemicals, and Textiles. Industrial Research Unit, Wharton School, University of Pennsylvania, 1978.