Hathairat Ongthanawat และ Sripathum Noom-ura. (2008) A survey of foreign customer satisfaction with Tip-Top restaurant at Patpong. Kasetsart University,:ม.ป.ท.Hathairat Ongthanawat และ Sripathum Noom-ura. 2008. A survey of foreign customer satisfaction with Tip-Top restaurant at Patpong. ม.ป.ท.:Kasetsart University,;Hathairat Ongthanawat และ Sripathum Noom-ura. A survey of foreign customer satisfaction with Tip-Top restaurant at Patpong. ม.ป.ท.:Kasetsart University, 2008. Print.