นาควิบูลย์วงศ์ ส. “A CAUSAL RELATIONSHIP MODEL OF LEARNING WITH HAPPINESS BASED ON EDUCATIONAL REFORM FOR STUDENTS OF SANTIRAT VOCATIONAL COLLEGE”. Sripatum Review of Humanities and Social Sciences, vol. 13, no. 1, Mar. 2018, pp. 112-21, https://so05.tci-thaijo.org/index.php/spurhs/article/view/117062.