CHAY, P.; JOGTHONG, C. An Analysis of English Textbooks Used in Lower Secondary Schools in Cambodia. Ratchaphruek Journal, [S. l.], v. 12, n. 2, p. 102–109, 2014. Disponível em: https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/240683. Acesso em: 26 aug. 2026.