Bernal, Paula Jessa, and Joedar Satojito. “Utilization and Effectiveness of Offline Digital Electronic Library (ODEL): Their Influence on Learners’ Engagement”. International Journal of Education, Research, and Innovation Perspectives, vol. 2, no. 8, Aug. 2026, pp. 1409-35, https://doi.org/10.5281/zenodo.22099072.