Imawan, Ben Manggar, and Qausya Faviandhani. 2018. “EFFECT OF REWARD SYSTEM, WORK ENVIRONMENT, AND EMPOWERMENT ON ORGANIZATIONAL CITIZENSHIP BEHAVIOR THROUGH EMPLOYEE ENGAGEMENT IN COAL UTILITY UNIT OF PT. PETROCHEMICAL GRESIK”. Jurnal Ekonomi 19 (1), 31 - 37. https://doi.org/10.29138/je.v19i1.58.