STOLTZFUS, M. D.; SUKSEEMUANG, P. Impact of Class Length on Student Engagement in Thai EFL Grammar Classes. Parichart Journal, [S. l.], v. 32, n. 2, p. 75–89, 2019. Disponível em: https://so05.tci-thaijo.org/index.php/parichartjournal/article/view/116466. Acesso em: 5 may. 2024.