Ermawati, Tuti, and Yeni Saptia. “KINERJA EKSPOR MINYAK KELAPA SAWIT INDONESIA ”. Buletin Ilmiah Litbang Perdagangan 7, no. 2 (December 31, 2013): 129-148. Accessed October 27, 2020. http://jurnal.kemendag.go.id/bilp/article/view/104.