Sallolo Suluh, Martina Pineng, Suri Toding Lembang, Normalia Sirande, Silka & Chendri Johan. “THE USE OF PINE FRUIT WASTE AN ALTERNATIVE ENERGY SOURCE BASED ON GRANULE VARIATION”. International Journal of Research Science and Management, vol. 4, no. 12, Dec. 2017, pp. 28-37, https://ijrsm.com/index.php/journal-ijrsm/article/view/493.