1. Ahmed, P.K., Rafiq, M., & Saad, N.M. (2003). Internal marketing and the mediating role of organisational competencies. European Journal of Marketing, 37(9), 1221-1241.
2. Applying Six Sigma to Achieve Enterprise Sustainability: Preparations and Aftermath of Six Sigma Projects;AlSagheer;Journal of Business & Economics Research,2011
3. A proposed model of TQM implementation in the Palestinian context;Baidoun;TQM and Business Excellence,2003
4. Daniel, C.N., & Berinyuy, L.P., (2010). Using the SERVQUAL Model to assess Service Quality and Customer Satisfaction. Umea School of Business. Retrieved from http://umu.diva-portal.org/smash/get/diva2:327600/FULLTEXT01.pdf.
5. The Effect of Internal Marketing on Outcomes and Factors Organizational Commitment (Case Study: Hotels in Esfahan);Esfahan;Basic. Appl. Sci. Res.,2013