Tamrin, Usman, Halim Halim, and Syarif Ahmad. 2018. “FACTORS THAT INFLUENCE THE PERFORMANCE OF COMPLAINT HANDLING OFFICER (CHO) IN THE WORKING UNIT CALL CENTER TELKOMSEL MAKASSAR”. Jurnal Administrasi Negara 24 (3):149-60. https://doi.org/10.33509/jan.v24i3.212.