Sihombing, Tetty Pryska Herawaty, Hardjanto, and Nurheni Wijayanto. 2013. “Candlenut Tree Management on People Forest in Tanah Pinem Subdistrict, Dairi Regency, Indonesia”. Jurnal Manajemen Hutan Tropika 19 (1): 46-53. https://journal.ipb.ac.id/jmht/article/view/6732.