Nittaya Manuy และ Chonlada Laohawiriyanon. (2016) Effects of Using Captioned and Keyword-only Pictures on Grade 2 Learners' English Speaking Ability. <i>Journal of International Studies, Prince of Songkla University</i>, <i>6</i>(2), 227-248.Nittaya Manuy และ Chonlada Laohawiriyanon. "Effects of Using Captioned and Keyword-only Pictures on Grade 2 Learners' English Speaking Ability". Journal of International Studies, Prince of Songkla University 6 (2016):227-248.Nittaya Manuy และ Chonlada Laohawiriyanon. Effects of Using Captioned and Keyword-only Pictures on Grade 2 Learners' English Speaking Ability. Faculty of International Studies, Prince of Songkla University:ม.ป.ท. 2016.