Doungsuwan, Sirotorn, and Wacharapatr Techawattanasiridumrong. 2021. “The School Lunch Project Administration Under School in Ayutthaya Primary Educational Service Area Office 1”. Mahachula Academic Journal 8 (2). Bangkok, Thailand:341-56. https://so04.tci-thaijo.org/index.php/JMA/article/view/252442.