Pruetsapa Hirunopaswong. และ Daniel fuchs. (2011) Improving service delivery process in the restaurant from the customer expectation. Silpakorn University:ม.ป.ท.Pruetsapa Hirunopaswong. และ Daniel fuchs. 2011. Improving service delivery process in the restaurant from the customer expectation. ม.ป.ท.:Silpakorn University;Pruetsapa Hirunopaswong. และ Daniel fuchs. Improving service delivery process in the restaurant from the customer expectation. ม.ป.ท.:Silpakorn University, 2011. Print.