แย้มแฟง เปรมจิต. 2019. “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 5 (2):234-46. https://so03.tci-thaijo.org/index.php/rpu/article/view/220555.