Vu, T. V., and D. N. Tran. “Demystifying Perceptual Learning Style Preferences of Vietnamese University Freshmen in English Academic Achievement”. International Journal of Learning, Teaching and Educational Research, vol. 19, no. 9, Sept. 2020, pp. 15-38, https://ijlter.myres.net/index.php/ijlter/article/view/240.