Leli Hasanah Lubis, Mhd. Rafi’i Ma’arif Tarigan, Ruminda Hutagalung, Nurhalimah, Emy Hariati, and Hotman Efendi Tanjung, “THE EFFECT OF PBL LEARNING MODEL ON THE FIFTH-GRADE STUDENTS’ MATH ARITHMETICAL SKILLS AT MIS PERDAMEAN SIGAMBAL”, JPFKIP, vol. 12, no. 2, pp. 293–305, Apr. 2023, doi: 10.33578/jpfkip.v12i2.9364.