YONGYE, N.; LAMPHAIPHANH, K.; SOURVATHAO, V.; YIAMACHANG, S.; CHOUALUEHER, S.; VANDALAK, P.; KONEPACHITH , D.; PHIPHATPHON, S. Factors Affecting Chemistry Learning Achievement and the Most Effective Methods for Lecturers to Help Students Improve Their Understanding and Marks, Faculty of Education, Souphanouvong University. sujournal 2019, 5, 113-126.