Cita APA (7th ed.)

Tschohl, J. (1997). Achieving excellence through customer service. Jaico.

Cita Chicago (17th ed.)

Tschohl, John. Achieving Excellence Through Customer Service. Bombay: Jaico, 1997.

Cita MLA (9th ed.)

Tschohl, John. Achieving Excellence Through Customer Service. Jaico, 1997.