Suhery, D, and S I Hasnain. “Social Contexts of Phonological Contrasts and Indexicality: Variability and Identity Among Singkils”. KnE Social Sciences 3, no. 4 (April 19, 2018): 178–190. Accessed April 20, 2024. https://knepublishing.com/index.php/KnE-Social/article/view/1930.