Satham, Sakaoduen, and Sirirat Sansamat. 2019. “Bak: Is It a Vulgar Word or a Pronoun in Isan Dialects?”. Journal of Mekong Societies 15 (2):71-85. https://so03.tci-thaijo.org/index.php/mekongjournal/article/view/199101.