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Umamah, Riza (2024) Workload Analysis for Employees with Multiple Positions. IRJ: Innovation Research Journal, 5 (1). pp. 10-17. ISSN 2721-6675
Umamah, Riza (2024) Analisis Beban Kerja Pada Karyawan Rangkap Jabatan PT. Gresik Cipta Sejahtera. undergraduate thesis, Universitas Muhammadiyah Gresik.