Munshid Lahad, A. “The Impact of the Waterfall Technique on Spelling Accuracy and Vocabulary Retention Among Primary EFL Learners”. (Humanities, Social and Applied Sciences) Misan Journal of Academic Studies , Vol. 24, no. 54, July 2025, pp. 30-46, https://www.misan-jas.com/index.php/ojs/article/view/929.