Namtapi, I. and Pongpairoj, N. (2016) “The acquisition of L2 English non-null arguments by L1 Thai learners”, Kasetsart Journal of Social Sciences, 37(3), pp. 150–157. available at: https://so04.tci-thaijo.org/index.php/kjss/article/view/242892 (accessed: 13 September 2026).