APA-Zitierstil (7. Ausg.)

Zemke, R., & Schaaf, D. (1990). The service edge: 101 companies that profit from customer care (1. Plume print.). Plume.

Chicago-Zitierstil (17. Ausg.)

Zemke, Ron, und Dick Schaaf. The Service Edge: 101 Companies That Profit from Customer Care. 1. Plume print. New York, NY u.a: Plume, 1990.

MLA-Zitierstil (9. Ausg.)

Zemke, Ron, und Dick Schaaf. The Service Edge: 101 Companies That Profit from Customer Care. 1. Plume print. Plume, 1990.