Somboon, T. ., O. . Limtasiri, and S. Prabyai. “Vocational Education Administration Between Thailand and Germany: A Comparative Study”. Suan Dusit Graduate School Academic Journal, vol. 18, no. 2, June 2022, pp. 15-29, https://so19.tci-thaijo.org/index.php/SDUGSAJ/article/view/243.