อินวรรณ์ เ.; ตั้งใจเจริญทรัพย์ น. English Speaking Ability of Students at Rajamangala University of Technology Lanna Lampang through Using Communicating Language Activities. Rattanakosin Journal of Social Sciences and Humanities, [S. l.], v. 3, n. 2, p. 82–97, 2021. Disponível em: https://so05.tci-thaijo.org/index.php/RJSH/article/view/254508. Acesso em: 11 dec. 2025.