Byham, W. C. (1988). Zapp!: The lightning of empowerment : how to improve productivity, quality, and employee satisfaction. New York: Ballantine Pub. Group.
Dyfyniad Arddull ChicagoByham, William C. Zapp!: The Lightning of Empowerment : How to Improve Productivity, Quality, and Employee Satisfaction. New York: Ballantine Pub. Group, 1988.
Dyfyniad MLAByham, William C. Zapp!: The Lightning of Empowerment : How to Improve Productivity, Quality, and Employee Satisfaction. New York: Ballantine Pub. Group, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.