GU, Y. (2002). Introduction. Asian Journal of English Language Teaching, 12(), 1-4. https://www.airitilibrary.com/Article/Detail?DocID=P20180321001-200212-201803260023-201803260023-1-4
Theorell, T. (2008). Introduction. SJWEH Supplements, (6), 3-5. https://www.airitilibrary.com/Article/Detail?DocID=17959926-200803-201102220023-201102220023-3-5