Phanida Phanich และ Suree Kongsomchit. (2008) Evaluation of in-house English training courses :. Thammasat University:ม.ป.ท.Phanida Phanich และ Suree Kongsomchit. 2008. Evaluation of in-house English training courses :. ม.ป.ท.:Thammasat University;Phanida Phanich และ Suree Kongsomchit. Evaluation of in-house English training courses :. ม.ป.ท.:Thammasat University, 2008. Print.