Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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