Utami, Rany, PutriEka Intan Kumala, and Meti Ekayani. 2018. “BIAYA EKSTERNAL DAN INTERNALISASI LIMBAH PABRIK KELAPA SAWIT”. Jurnal Pengelolaan Sumberdaya Alam Dan Lingkungan (Journal of Natural Resources and Environmental Management) 8 (2). Bogor, ID, 143-50. https://doi.org/10.29244/jpsl.8.2.143-150.