??????, ???????.  (2541).  ?????????????????????????????????? ????????????????????? ?????????.  (??????? ???????, Ed.). presented at the 2541, ????????: ???????????????????????.

??????, ???????.  (2540).  ??????????????????????????????? ????????? ?????????? ???????????????. presented at the 2540, ????????: ???????????????????????.

??????, ???????.  (2533).  ????????? (p. 362 ????). ????????: ?????????????????????. ????????????????. ??????????????????????. Retrieved from http://etheses.psru.ac.th/lib-irpsru/?q=th/node/1007

??????, ???????.  (2528).  ????????????????? (p. 230). ????????: ?????????????????????.????????????????. ??????????????????????. Retrieved from http://etheses.psru.ac.th/lib-irpsru/?q=th/node/1008