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HUBUNGAN ANTARA PERILAKU BULLYING TERHADAP KEPERCAYAAN DIRI SISWA SISWA KELAS IX.B DIĀ  SMP N 31 BATAM. Liberosis [Internet]. 2025 Sep. 29 [cited 2026 Oct. 28];16(4):1-10. Available from: https://ejournal.cibinstitut.com/index.php/liberosis/article/view/155