Simatupang, David Oscar. “Vegetable Commodity Supply Chain Integration Between Productivity of Transportation, the Farm Share and Margin of Measurement for Profits at North Sulawesi”. KnE Life Sciences 2, no. 6 (November 26, 2017): 305-313. Accessed March 27, 2023. https://knepublishing.com/index.php/KnE-Life/article/view/1051.