1Gregory H ·Watson, "Cycles of Learning Observations of Jack Welch", Six Sigma Forum Magazine, Vol. 1, No. 1, November 2001, pp. 13.
2Based on Barbara A ·Spencer, "Models of Organization and Total Quality Management: A Comparison and Critical Evaluation", Academy of Management Review, Vol. 19, No. 3, 1994, pp.446.
3Harry J ·Levinson and Chuck DeHont, "Leading to Quality",May 1992, pp55.
4Arthur R ·Tener and Irving J. DeToro,"Total Quality Management: Three Steps to Continuous Improvement", Reading, Mass,: Addison Wesley, 1992.
