Saediman, Haji, Ade Irma, and Munirwan Zani. “Determinants of Value Added in Copra Production in Central Buton District of Southeast Sulawesi”. International Journal of Research in Engineering, Science and Management 6, no. 1 (February 1, 2023): 92–96. Accessed May 19, 2024. https://journal.ijresm.com/index.php/ijresm/article/view/2526.