Suganda, Eko, et al. “The Effect of Education, Professionalism, Quality of Work Life, and Work Discipline on Employee Performance at PT. Telkom (Persero) Tbk Branch Rantauprapat”. Daengku: Journal of Humanities and Social Sciences Innovation, vol. 3, no. 2, Jan. 2023, pp. 225-34, doi:10.35877/454RI.daengku1495.