Rohmana, D. Y., K. Estelina, and I. Iskandar. “The Bullying Phenomenon and Handling Efforts in Reducing Cases of Bullying: A Systematic Review”. Jurnal Ners, vol. 15, no. 1Sp, July 2020, pp. 557-62, doi:10.20473/jn.v15i1Sp.20479.