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International Journal of Trend in Scientific Research and Development (IJTSRD) ISSN: 2456-6470
                                                   nd
                                  Special Issue of 2  International Congress of Engineering
        29) Universidad  TecVirtual  del  Sistema  Tecnológico  30) Zeithaml, V. A., y Bitner, M. J. (2000). Services
            de  Monterrey.  (2012).  El  instrumento  Servqual.    marketing:  Integrating  customer  focus  across  the
            Círculo  Tec.  Universidad TecVirtual  del Sistema     firm. 2nd ed. Boston: McGraw-Hill.
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