Wanita Mastan และ Adisa Teo. (2017) Students' Preference for Teachers' Motivational Strategies and their Perception of their Own Motivation toward Learning English: A Case of Private Vocational Colleges. <i>Silpakorn University Journal of Social Sciences, Humanities, and Arts</i>, <i>17</i>(1), 161-186.Wanita Mastan และ Adisa Teo. "Students' Preference for Teachers' Motivational Strategies and their Perception of their Own Motivation toward Learning English: A Case of Private Vocational Colleges". Silpakorn University Journal of Social Sciences, Humanities, and Arts 17 (2017):161-186.Wanita Mastan และ Adisa Teo. Students' Preference for Teachers' Motivational Strategies and their Perception of their Own Motivation toward Learning English: A Case of Private Vocational Colleges. Silpakorn University Research and Development Institute:ม.ป.ท. 2017.