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