Christianadi, Januar Ika, Sopiah Sopiah, and Arief Noviarakhman Zagladi. “PENGARUH DISIPLIN KERJA, MOTIVASI KERJA, ETOS KERJA DAN LINGKUNGAN KERJA TERHADAP PRODUKTIVITAS KERJA KARYAWAN: STUDI PADA PT. TJIWI KIMIA”. SCIENTIFIC JOURNAL OF REFLECTION : Economic, Accounting, Management and Business 7, no. 4 (October 1, 2024): 1371-1384. Accessed October 7, 2026. https://ojspustek.org/index.php/SJR/article/view/999.