Gaya APA

Zemke, R., Chip, I, B. (2003). Service magic: the art of amazing your customers . New York: New York: Dearborn Trade, 2003.

Gaya MLA

Zemke, Ron., Chip, I., Bell,. "Service magic: the art of amazing your customers". New York: New York: Dearborn Trade, 2003, 2003. Text.