Purnomo, Herry. “Degradasi Hutan Dan Pengangguran: Menuju Pengelolaan Hutan Skala Kecil (Forest Degradation and Unemployment: Towards Small-Scale Forest Management)”. Jurnal Manajemen Hutan Tropika 12, no. 2 (1). Accessed August 15, 2020. http://journal.ipb.ac.id/index.php/jmht/article/view/2859.