Phuhadkarn, M., and S. . Julsuwan. “THE DEVELOPMENT OF A GUIDELINE FOR PARTICIPATION IN OCCUPATION TRAINING IN MECHANICS DEPARTMENT BETWEEN COLLEGES AND ESTABLISHMENTS UNDER KALASIN VOCATIONAL EDUCATION”. Journal of MCU Nakhondhat, vol. 7, no. 5, May 2020, pp. 250-63, https://so03.tci-thaijo.org/index.php/JMND/article/view/243401.