KURNIAWAN, P. W. . PENGARUH POSITIVE REINFORCEMENT TERHADAP HASIL BELAJAR SEJARAH SISWA DI SMA ADIGUNA BANDAR LAMPUNG. Lentera: Jurnal Ilmiah Kependidikan, [S. l.], v. 11, n. 1, p. 71–80, 2018. Disponível em: https://jurnal.stkippgribl.ac.id/index.php/lentera/article/view/375. Acesso em: 3 jul. 2024.