Bhyam, W. C., & Cox, J. Zapp!: The lightning of empowerment: how to improve quality, productivity, and employee satisfaction (First edition.). Harmony Books.

Bhyam, William C., and Jeff Cox. Zapp!: The Lightning of Empowerment: How to Improve Quality, Productivity, and Employee Satisfaction. First edition. New York: Harmony Books.

Bhyam, William C., and Jeff Cox. Zapp!: The Lightning of Empowerment: How to Improve Quality, Productivity, and Employee Satisfaction. First edition. Harmony Books.