Gray, W. B. (1986). Productivity versus OSHA and EPA regulations. Michigan: Umi Reseach Press.
Chicago Style citaatGray, Wayne B. Productivity Versus OSHA and EPA Regulations. Michigan: Umi Reseach Press, 1986.
MLA citatieGray, Wayne B. Productivity Versus OSHA and EPA Regulations. Michigan: Umi Reseach Press, 1986.
Let op: Deze citaties zijn niet altijd 100% accuraat.