R. Resdillapratiwi and L. A. Damanik, “Introduction to Linguistics from a Phonological Perspective: The Final Vowel /a/ → [o] and Word-Initial Rhotic /r/ → [ɣ] Correspondences in the Batahan Dialect”, JOLLS. Lang. Liter. Studies, vol. 6, no. 3, pp. 1039–1052, Sep. 2026, doi: 10.36312/jolls.v6i3.5106.