รัตนากร ก. มุมห้องเรียน. Journal of Education Studies, Chulalongkorn University, Bangkok, Thailand, v. 42, n. 3, p. 216–225, 2014. Disponível em: https://so02.tci-thaijo.org/index.php/EDUCU/article/view/26043. Acesso em: 16 sep. 2026.