Ismail, S. S. . (2023) “Barriers Towards the Implementation of E-portfolio in Education Based on the Diffusion of Innovation Theory”, International Journal of Learning, Teaching and Educational Research, 22(4), pp. 512–540. Available at: https://www.ijlter.myres.net/index.php/ijlter/article/view/1601 (Accessed: 7 May 2026).