คลังวิทยานิพนธ์เเละงานวิจัย มหาวิทยาลัยอุบลราชธานี

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2003
Poottaporn Rattanawan. (2003). The effectiveness of self-created role-plays on speaking skill. Faculty of Liberal Arts, Ubon Rachathani University, Ubon Rachathani.
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