Kheang, Somanita, and Archanya Ratana-ubol. 2014. “Proposed Guidelines for Organizing Non-Formal Education to Enhance Career Development for Unskilled Workers in The Kingdom of Cambodia”. Journal of Education Studies, Chulalongkorn University 42 (December). Bangkok, Thailand:1-17. https://so02.tci-thaijo.org/index.php/EDUCU/article/view/26456.