Joy Novi Yanti Lumbantobing, Jojor Mindo Manullang, Murniwati Lase, Al Firman, and Reylan Silverius Sinaga, “Observasi Metode Pembelajaran PPKN Di SMP Negeri 35 Medan”, jpkf-widyakarya, vol. 1, no. 4, pp. 172–178, Nov. 2023.