Putriana, and Chalif Ahmad Sahputra. 2021. “The Effect of Discipline and Work Environment on Employee Productivity of Palm Oil Factory (PKS) of PT. Perkebunan Nusantara V Sei. Rokan, Pagaran Tapah Subdistrict, Rokan Hulu Regency, Riau”. INTERNATIONAL JOURNAL OF TRENDS IN ACCOUNTING RESEARCH 2 (2):193-204. https://jurnal.adai.or.id/index.php/ijtar/article/view/80.