Choksuansup, N., and M. Tangpijaikul. “The Effect of Concordancing-Based Teaching on Vocabulary Learning and Retention on Thai EFL Learners”. Chophayom Journal, vol. 28, no. 3, Dec. 2017, pp. 11-19, https://so01.tci-thaijo.org/index.php/ejChophayom/article/view/106974.