Phatharawisetphan, Raiwinpapha. “THE EFFECTS OF THE INSTRUCTIONAL PACKAGES ON COMMUNICATIVE ENGLISH TENSES FOR GRADE 9 STUDENTS”. Journal of Graduate School Sakon Nakhon Rajabhat University 13, no. 61 (June 20, 2016): 79–92. accessed September 23, 2026. https://so02.tci-thaijo.org/index.php/SNGSJ/article/view/59239.