Ibrahim, M. M., Jamaludin, K. A., Rosli, M. S., Damanhuri, M. I. M., Taha, H., & Borhan, M. T. (2022). Enhancing Self-Directed Learning Skills via Blended Problem-based Learning in Chemistry Learning. CENTRAL ASIA AND THE CAUCASUS, 23(1), 1818-1835. https://ca-c.org/index.php/cac/article/view/253