SAMITSOMBOON, M. A STUDY OF SELF-DISCIPLINE OF VOCATIONAL CERTIFICATE STUDENTS IN PRE-ENGINEERING COURSE. Research Community and Social Development Journal, Nakhon Ratchasima, Thailand, v. 17, n. 2, p. 180–190, 2023. DOI: 10.14456/nrru-rdi.2023.29. Disponível em: https://so04.tci-thaijo.org/index.php/NRRU/article/view/265272. Acesso em: 17 sep. 2026.