Ermi, A., and M. S. Sarumaha. “The Effect of Work Motivation and Work Discipline Toward The Performance of Toma District Officers at South Nias”. Prosiding ICSMR, Vol. 1, no. 1, Mar. 2020, pp. 50-60, http://conference.loupiasconference.org/index.php/ICSMR/article/view/4.