Naiyana Ratanasuwanachart และผู้แต่งคนอื่นๆ. (2006) A proposed management model for distance education in Thai higher education institutions. National Institute of Development Administration:ม.ป.ท.Naiyana Ratanasuwanachart และผู้แต่งคนอื่นๆ. 2006. A proposed management model for distance education in Thai higher education institutions. ม.ป.ท.:National Institute of Development Administration;Naiyana Ratanasuwanachart และผู้แต่งคนอื่นๆ. A proposed management model for distance education in Thai higher education institutions. ม.ป.ท.:National Institute of Development Administration, 2006. Print.