Ndruru, T. F. ., M. Siregar, M. L. . Panjaitan, R. R. S. . Purba, and H. . Lubis. “Analysis of the Influence of Training, Discipline and Safety on the Performance of Medan City Fire Department Officers”. East Asian Journal of Multidisciplinary Research, vol. 2, no. 6, June 2023, pp. 2301-20, doi:10.55927/eajmr.v2i6.4557.