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Rery RU, Erviyenni E, Hardiyansyah MA. Development of electronic activity sheet based preview, question, read, reflect, recite, review (pq4r) learning strategy on ion balance and pH of buffer solution. J.Pendidik.Kim [Internet]. 2022 Aug. 13 [cited 2025 Jul. 9];14(2):120-3. Available from: https://jurnal.unimed.ac.id/2012/index.php/jpk/article/view/34639