. C. T. . Hastuti, A. Anugrahana, and . A. . Saptoro, “Penerapan PBL: Meningkatkan Keaktifan Siswa Selama PTM Masa Pandemi Covid-19 di SD Maria Assumpta”, JPDK, vol. 4, no. 4, pp. 3242–3246, Aug. 2022.