Ashar, Ashar, et al. “The Effectiveness of Thematic Learning Through the Application of the Logan Avenue Problem Solving – Heuristic (LAPS - Heuristic) Model for SDN 331 Borongtellu Students”. Cokroaminoto Journal of Primary Education, vol. 5, no. 1, Apr. 2022, pp. 153-60, doi:10.30605/cjpe.512022.1584.