PISAIPAN, K.; SUNANTA, P. English speaking instructional system . Journal of Lanna Societies, [S. l.], v. 1, n. 1, p. 10–20, 2023. Disponível em: https://so13.tci-thaijo.org/index.php/jls/article/view/225. Acesso em: 15 sep. 2026.