APA (7th ed.) Citation

Zemke,Ron. (1989). The service edge: 101 companies that profit from customer care. Penguin books.

Chicago Style (17th ed.) Citation

Zemke,Ron. The Service Edge: 101 Companies That Profit from Customer Care. Canada: Penguin books, 1989.

MLA (9th ed.) Citation

Zemke,Ron. The Service Edge: 101 Companies That Profit from Customer Care. Penguin books, 1989.

Warning: These citations may not always be 100% accurate.