APA (7th ed.) Citation

Katz, B. (1987). Here's how to turn customer service into customer sales. NTC Learning Works.

Chicago Style (17th ed.) Citation

Katz, Bernard. Here's How to Turn Customer Service into Customer Sales. Lincolnwood, Ill: NTC Learning Works, 1987.

MLA (9th ed.) Citation

Katz, Bernard. Here's How to Turn Customer Service into Customer Sales. NTC Learning Works, 1987.