SIRIPHOT, T.; HAMCUMPAI, S. The Effect of Cooperative Learning on Students’ Speaking Self-efficacy. KKU Research Journal (Graduate Studies) Humanities and Social Sciences, [S. l.], v. 8, n. 2, p. 145–154, 2020. Disponível em: https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/245330. Acesso em: 16 sep. 2026.