Surintham, Wilaiphan, and Nitida Adipattaranan. 2020. “ENGLISH LEARNING MANAGEMENT FOCUSING ON PROBLEM-BASED LEARNING TO PROMOTE ENGLISH WRITING ABILITY AND ENGLISH SELF-LEARNING OF ELEVENTH GRADE STUDENTS”. JOURNAL OF EDUCATION NARESUAN UNIVERSITY 22 (2):169-81. https://so06.tci-thaijo.org/index.php/edujournal_nu/article/view/104381.