yaaoop, theerawut, P. Poungkaew, C. Puthaprasert, and P. Tummachai. “The process for enhancing the voluntary identities of the vocational students under the Vocational Education Commission”. Interdisciplinary Research Review, vol. 18, no. 2, Apr. 2023, https://ph02.tci-thaijo.org/index.php/jtir/article/view/247618.