Sakuldee, P., C. Puttirungroj, and S. Areeraksakul Konglok. “The Effects of Problem-Based Learning on Mathematical Problem-Solving Abilities and Mathematical Learning Achievement in Basic Mathematics for Careers among First-Year Vocational Certificate Students at Hat Yai Technical College, Songkhla Province”. Interdisciplinary Academic and Research Journal, vol. 6, no. 3, May 2026, p. e293380, doi:10.60027/iarj.2026.e293380.