Kasper, H. (1999). Services marketing management: An international perspective. New york: John Wiley and Sons.
Παραπομπή Chicago StyleKasper, Hans. Services Marketing Management: An International Perspective. New york: John Wiley and Sons, 1999.
Παραπομπή MLAKasper, Hans. Services Marketing Management: An International Perspective. New york: John Wiley and Sons, 1999.
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