Rahmayanti, Dina, Rika Ampuh Hadiguna, Santosa Santosa, and Novizar Nazir. “Determining The Profit Margin In ‘Patchouli Oil’ Supply Chain: A Case Study In Indonesia”. International Journal on Advanced Science, Engineering and Information Technology 8, no. 2 (April 27, 2018): 483–488. Accessed August 24, 2024. https://ijaseit.insightsociety.org/index.php/ijaseit/article/view/3485.