Hutauruk, Ricca Rohani, et al. “Spatial Modeling for Determining Managerial Options for Structuring Productivity in KPH Bogor”. Jurnal Manajemen Hutan Tropika, vol. 22, no. 3, Dec. 2016, p. 169, https://journal.ipb.ac.id/jmht/article/view/15465.