R. M. Ali, S. Hadi, W. Purbani, S. Nuriyah Muso Utomo, M. Kunta Biddinika, and D. Hastuti, “Evaluating the implementation of E-portfolio-based learning in ELT through the CIPP model: A qualitative descriptive study in Indonesia”, Engl. Lang. Teach. Educational. Journal, vol. 8, no. 3, pp. 177–191, Dec. 2025.