Zulkifli N. A. “Satisfaction and Continued Intention of Digital Textbook of Language Assessment and Evaluation: Expectation-Confirmation Model (ECM) Perspective”. Proceder: Applied Linguistics, Literature, and Language Education, Vol. 2, no. 1, Februari 2025, hlm. 38-41, http://proceedings.upi.edu/index.php/Conaplin/article/view/4184.