Cita APA
Zemke, R. (1989). The service edge: 101 companies that profit customer care. Penguin.
Citación estilo Chicago
Zemke, Ron. The Service Edge: 101 Companies That Profit Customer Care. New York: Penguin, 1989.
Cita MLA
Zemke, Ron. The Service Edge: 101 Companies That Profit Customer Care. Penguin, 1989.
Warning: These citations may not always be 100% accurate.