DONPHANMUANG, O.; PHARANAT, W.; HATTHAPROM, P. Development of collaborative learning activities using CIRC techniques with exercises to promote the ability to pronounce diphthongs for grade 3 students . Journal for Developing the Social and Community , Bangkok, Thailand, v. 12, n. 3, p. 1–16, 2025. Disponível em: https://so03.tci-thaijo.org/index.php/rdirmu/article/view/288536. Acesso em: 1 oct. 2026.