D. T. . Virratih and W. Widyastuti, “Differences in Job Satisfaction Between Permanent Employees and Outsourcing Employees of PT. Domusindo Perdana: Perbedaan Kepuasan Kerja Antara Karyawan Tetap Dan Karyawan Outsourcing PT. Domusindo Perdana”, icecrs, vol. 8, Aug. 2020.