Rahayuningrum, Ninuk, Wayan Susila, and Tjahya Widayanti. “ANALYSING FACTORS DETERMINING SUGAR RETAIL PRICE”. Buletin Ilmiah Litbang Perdagangan 1, no. 2 (February 6, 2018): 82-103. Accessed October 22, 2020. http://jurnal.kemendag.go.id/bilp/article/view/298.