Bumrungkarn, Rujira. “The Negative Form ma:j2 as a Pragmatic Marker in Casual Conversations in Nakhon Si Thammarat Thai”. Journal of Letters 48, no. 2 (December 27, 2019): 1–32. accessed December 11, 2025. https://so03.tci-thaijo.org/index.php/jletters/article/view/232290.