HASAN, M. K. .; ZENGIN, R. .; BASMAZ, M. .; HOSSAIN, M. T. .; HOQUE, M. S. .; MOHIUDDIN, M. G. . Lexical Diversity, Density, and Word Frequency in CEFR A2 ELT Coursebook Reading Texts in Turkish Higher Education: A Corpus-Based Comparative Analysis of Three Coursebooks. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 25, n. 5, p. 734–755, 2026. Disponível em: https://www.ijlter.net/index.php/ijlter/article/view/2873. Acesso em: 26 jul. 2026.