Judith, Eda, Syawaluddin Syawaluddin, Elcy Handayani Pramita, and Thomas Sumarsan Goh. “Pengaruh Stres Kerja Dan Etos Kerja Terhadap Produktivitas Kerja Karyawan PT. Greenex Sumatera Mandiri Medan”. Management Studies and Entrepreneurship Journal (MSEJ) 3, no. 5 (September 20, 2022): 2636–2644. Accessed July 12, 2025. https://yrpipku.com/journal/index.php/msej/article/view/1002.