Darwis, Darwis, Sofiyan Matondang, & Marudut Sianturi. " THE EFFECT OF WORK DISCIPLINE AND WORK MOTIVATION ON EMPLOYEE WORK ACHIEVEMENT AT EDUCATION OFFICE OF NORTH SUMATERA PROVINCE." JURNAL PROINTEGRITA [Online], 5.1 (2020): 147-164. Web. 29 Dec. 2024