Reference
Bullying. https://www.stopbullying.gov/
Sigurdson, J. F., Undheim, A. M., Wallander, J. L., Lydersen, S., & Sund, A. M. (2015). The long-term effects of being bullied or a bully in adolescence on externalizing and internalizing mental health problems in adulthood. Child and Adolescent Psychiatry and Mental Health, 9, 42.
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Centres for Disease Control and Department of Education. (2014). Facts about Bullying. Retrieved from https://www.stopbullying.gov/media/facts/index.html#definition
Bullying: What to Do If I am Bullied (n.d.) https://www.mhanational.org/bullying-what-do-if-im-bullied
Cox-Wingo, V., & Poirier, S. (2019). Bullying and Mental Health. In School Violence in International Contexts (pp. 115-129). Springer, Cham.