Natirath Weeranakin, Pachoen Kidrakarn and Sangkom Pumipuntu
Pakistan Journal of Social Sciences 8 ( 6 ): 280 - 283 , 2011
Khachakrit Liamthaisong, Sangkom Pumipuntu and Sanit Kayapard
The Social Sciences 6 ( 5 ): 375 - 378 , 2011