Mareta, S., I. Ilwandri, and T. A. Santosa. “Size Effect of Blended Learning Model on Students’ Problem Solving Ability in Geography Learning”. Edumaspul: Jurnal Pendidikan, Vol. 7, no. 1, Mar. 2023, pp. 1460-7, doi:10.33487/edumaspul.v7i1.6140.