1. I. I.Doronina, V. N. Borobov, E. A. Ivanova, E. V. Gorynya and B. M. Zhukov, International journal of economics and financial issues 6(1), 295–299 (2016).
2. Amir, R. Mardhiyah, B. Burhanuddin and W. B. Priatna, Indonesian Journal of Business and Entrepreneurship (IJBE) 4.1, 1–1 (2018).
3. Energy output:input ratio of maize and sorghum management systems in eastern Nebraska
4. Rahim, Abd and D. R. D. Hastuti, Kampus Gunung Sari Baru Makassar : Badan Penerbit Universitas Negeri Makassar (2005).
5. Raw Material Procurement on Agroindustrial Supply Chain Management: A Case Survey of Fruit Processing Industries in Indonesia