Zega, Irwansyah, Ahmad Laut Hasibuan, and Asnawi. “Developing English Pronouncation Teaching Materials for Second Grade Students Though Tongue Twister”. International Journal of Educational Research Excellence (IJEREC) 6, no. 1 (July 26, 2026): 634–647. Accessed October 7, 2026. https://ejournal.ipinternasional.com/index.php/ijere/article/view/1994.