Nugroho, Septiyan, and Ni Wayan Sukmawati Puspitadewi. 2015. “Work Enjoyment Dan Organizational Citizenship Behavior Pada Karyawan PT. Petrokimia Kayaku”. Jurnal Psikologi Teori Dan Terapan 6 (1):9-17. https://doi.org/10.26740/jptt.v6n1.p9-17.