Mendrofa, G. M., E. B. Harefa, A. Telaumbanua, and A. Telaumbanua. “Analysis of the Application of Problem Based Learning Model to Students’ Problem Solving Skills on the Material of the Stages of Foundation Work Implementation in SMK”. Edumaspul: Jurnal Pendidikan, Vol. 8, no. 2, Oct. 2024, pp. 2831-5, doi:10.33487/edumaspul.v8i2.8336.