Ferdiansyah, D., M. A. Syukri, and P. H. Mardhia. “Consonant Sound Alternations in Speech: A Case Study of Students With Class III Malocclusion Condition”. NOBEL: Journal of Literature and Language Teaching, vol. 16, no. 2, Oct. 2025, pp. 221-36, doi:10.15642/NOBEL.2025.16.2.221-236.