Ernanda, Yovie, Nefidodo Landrika Tarigan, Suarmin Jaya Waruwu, Linri Novalia Sinaga, Erlin Natalia, and Edisah Putra Nainggolan. “Pengaruh Motivasi, Disiplin, Lingkungan Kerja Terhadap Kinerja Karyawan Pada PT Sumo Internusa Indonesia”. Management Studies and Entrepreneurship Journal (MSEJ) 4, no. 4 (June 27, 2023): 3735–3747. Accessed July 5, 2025. https://www.yrpipku.com/journal/index.php/msej/article/view/2486.