Hafrida, Lis, and Mufti Hasan Alfani. “Pengaruh Pembuatan Ecobrick Terhadap Tingkat Kepedulian Lingkungan Pada STIE TN Dumai”. Management Studies and Entrepreneurship Journal (MSEJ) 1, no. 2 (July 1, 2020): 127–132. Accessed May 13, 2026. https://old.yrpipku.com/index.php/msej/article/view/102.