Gray, W. B. (1986). Productivity versus OSHA and EPA regulations. Michigan: Umi Reseach Press.
シカゴスタイル引用形Gray, Wayne B. Productivity Versus OSHA and EPA Regulations. Michigan: Umi Reseach Press, 1986.
MLA引用形式Gray, Wayne B. Productivity Versus OSHA and EPA Regulations. Michigan: Umi Reseach Press, 1986.
警告: この引用は必ずしも正確ではありません.