“PENGARUH POSITIVE REINFORCEMENT TERHADAP HASIL BELAJAR SEJARAH SISWA DI SMA ADIGUNA BANDAR LAMPUNG” (2018) Lentera: Jurnal Ilmiah Kependidikan, 11(1), pp. 71–80. Available at: https://jurnal.stkippgribl.ac.id/index.php/lentera/article/view/375 (Accessed: 24 April 2026).