Thi Phan, T.-T., H.-G. Thi Tran, L.-H. Thi Nguyen, T.-P. Pham, T.-T. Nguyen, H.-H. Pham, and T.-Q. Cao. “The Role of Non-Academic Service Quality in an Academic-Oriented Context: Structural Equation Modeling Amongst Parents of Secondary Education Students”. International Journal of Learning, Teaching and Educational Research, vol. 20, no. 8, Aug. 2021, pp. 210-26, https://ijlter.myres.net/index.php/ijlter/article/view/50.