Nattawan Chaiyadhiroj และ Wanida Phankaeo. (2009) The customers' satisfaction with the office's canteen :. Language Institute, Thammasat University,:ม.ป.ท.Nattawan Chaiyadhiroj และ Wanida Phankaeo. 2009. The customers' satisfaction with the office's canteen :. ม.ป.ท.:Language Institute, Thammasat University,;Nattawan Chaiyadhiroj และ Wanida Phankaeo. The customers' satisfaction with the office's canteen :. ม.ป.ท.:Language Institute, Thammasat University, 2009. Print.