Wulan, Sri Ayu Gerana, Son Haji, and Purwanto Purwanto. “PENGARUH KERJA SHIFT TERHADAP EFEKTIVITAS KERJA KARYAWAN PT SIGMA AND HEART INDONESIA ”. Bussman Journal : Indonesian Journal of Business and Management 5, no. 2 (August 8, 2025): 1665–1681. Accessed September 26, 2025. https://www.bussman.gapenas-publisher.org/index.php/home/article/view/441.