Soopunyo, Weerachat, Archanya Ratana-Ubol, Wirathep Pathumcharoenwattana, and Suwithida Charungkaittikul. 2015. “Incorporating Non-Formal Learning and Education into Formal Schooling Conditions”. Journal of Education Studies 43 (3). Bangkok, Thailand:39-49. https://so02.tci-thaijo.org/index.php/EDUCU/article/view/40544.