NGUYEN NGAN HA, Tran; THANH TAN, Ta; MINH NGOC, Nguyen. AN INVESTIGATION INTO THE EFFECT OF TEXTBOOK ADAPTATIONON SECONDARY SCHOOL STUDENTS’ LANGUAGE PROFICIENCY. Journal of Science Educational Science, [S. l.], v. 69, n. 3, p. 89–98, 2024. DOI: 10.18173/2354-1075.2024-0050. Disponível em: https://hnuejs.edu.vn/es/article/view/112.. Acesso em: 18 dec. 2024.