Worapha Chansupharin. (1997) Effects of versatext program on reading comprehension of remedial students of the School of Social Development at NIDA. National Institute of Development Administration:ม.ป.ท.Worapha Chansupharin. 1997. Effects of versatext program on reading comprehension of remedial students of the School of Social Development at NIDA. ม.ป.ท.:National Institute of Development Administration;Worapha Chansupharin. Effects of versatext program on reading comprehension of remedial students of the School of Social Development at NIDA. ม.ป.ท.:National Institute of Development Administration, 1997. Print.