Layukan, S., G. B. Non Shamdas, and M. Erwin. “The Implementation of Problem Based Learning Model Assisted by Scaffolding Method to Improve Students’ Communication Ability at SMA Negeri 4 Palu”. International Journal on Advanced Science, Education, and Religion, Vol. 8, no. 3, Oct. 2025, pp. 241-9, doi:10.33648/ijoaser.v8i3.1217.