Charoento, Mongkol. 2021. “ENHANCING ENGLISH GRAMMATICAL COMPETENCE AND WRITTEN PERFORMANCE FOR FIRST YEAR NON-ENGLISH MAJOR UNDERGRADUATES THROUGH A SELF-INSTRUCTIONAL PACKAGE COUPLED WITH PROCESS-BASED WRITING”. Phranakhon Rajabhat Research Journal : Humanities and Social Sciences 16 (2):130-47. https://so05.tci-thaijo.org/index.php/PNRU_JHSS/article/view/253495.