Anyarat Nattheeraphong และผู้แต่งคนอื่นๆ. (2004) Teachers' understanding of english as an international language. National Institute of Development Administration:ม.ป.ท.Anyarat Nattheeraphong และผู้แต่งคนอื่นๆ. 2004. Teachers' understanding of english as an international language. ม.ป.ท.:National Institute of Development Administration;Anyarat Nattheeraphong และผู้แต่งคนอื่นๆ. Teachers' understanding of english as an international language. ม.ป.ท.:National Institute of Development Administration, 2004. Print.