Susilawati E, Yahya SZ, Simanjuntak WF. FACTORS INFLUENCE THE BEHAVIOR OF BULLYING AT THE STUDENTS OF SMK PGRI 8 MEDAN IN 2015. pannmed [Internet]. 2019 Jan. 28 [cited 2024 Nov. 24];10(2):209-15. Available from: http://ojs.poltekkes-medan.ac.id/pannmed/article/view/292