Sabphaso N. Management of learning activities according to the Philosophy of Sufficiency Economy of Educational Institutions in the Office of Phayao Primary Educational Service Area 1. Humanities and Social Sciences Nakhonsawan Rajabhat University Academic Journal [internet]. 2021 Dec. 30 [cited 2025 Dec. 6];8(2):43-58. available from: https://so05.tci-thaijo.org/index.php/hssnsru/article/view/253946