APA Style

Wheat, B. et al (2003). Leaning Into Six Sigma; A Parable of the Journey to Six Sigma and a Lean Enterprise . New York: McGraw-Hill.

MLA Style

Wheat, Barbara. et al. "Leaning Into Six Sigma; A Parable of the Journey to Six Sigma and a Lean Enterprise". New York: McGraw-Hill, 2003. Text.