Ridho, M., R. Witarsa, M. I. Daulay, N. Nurhaswinda, and P. H. Pebriana. “Improving Mastery of Science Concepts Using Problem Based Learning Models in Class V in Elementary School”. Edumaspul: Jurnal Pendidikan, Vol. 6, no. 2, Oct. 2022, pp. 3193-02, doi:10.33487/edumaspul.v7i1.5002.