A. Laia, B. Lase, and S. Hulu, “The Role of PPKN Teachers in Strengthening Student Character as an Effort to Prevent Bullying At SMP Negeri 5 Ulunoyo in the 2022/2023 Academic Year”, edumaspul, vol. 7, no. 2, pp. 5763-5768, Oct. 2023.