แย้มแฟง เ. “The Role of Executive in Academic Management of Early Childhood Education in Primary Educational Service Area Office Section 1 in Nonthaburi Province”. Journal of Humanities and Social Sciences, Rajapruk University, vol. 5, no. 2, Sept. 2019, pp. 234-46, https://so03.tci-thaijo.org/index.php/rpu/article/view/220555.