Ta, N. ., and A. B. . Razali. “Concept Mapping for Improving Reading Comprehension in Second Language Education: A Systematic Review”. International Journal of Learning, Teaching and Educational Research, vol. 22, no. 8, Aug. 2023, pp. 287-00, http://www.ijlter.myres.net/index.php/ijlter/article/view/1719.