Andrew, L. Sweeney.  (2560).  using task-based learning approach and drama to improve communicative competence for students at pibulsongkram rajabhat university. ????????????????????????????. ????????????????????????????, ????????.

?????????, ????????????.  (2558).  ?????????????????????????????????????????????????????????????? (Collaborative Learning) ???????????????????? (Swine Production) ????????????????????????????? ?????????????? ???????????????????????????? ???????????????????????????. ????????: ????????????????????????????. Retrieved from http://etheses.psru.ac.th/lib-irpsru/?q=th/node/1042

?????????, ??????.  (2551).  ???????????????????????????????????????????????????????????????????????????????????????? 2 ???????????????????????????????? CIRC. ????????????????????????????, ????????. Retrieved from http://etheses.psru.ac.th/lib-irpsru/?q=th/node/72