Susilawati, E., S. Z. Yahya, and W. F. Simanjuntak. “FACTORS INFLUENCE THE BEHAVIOR OF BULLYING AT THE STUDENTS OF SMK PGRI 8 MEDAN IN 2015”. Jurnal Ilmiah PANNMED (Pharmacist, Analyst, Nurse, Nutrition, Midwivery, Environment, Dentist), vol. 10, no. 2, Jan. 2019, pp. 209-15, doi:10.36911/pannmed.v10i2.292.