Hardi, Ode Sofyan. “ANALISIS MODEL HAROLD HOTELLING DALAM PENENTUAN LOKASI BIMBINGAN BELAJAR”. Jurnal Spatial Wahana Komunikasi dan Informasi Geografi 13, no. 1 (March 30, 2015): 1-13. Accessed May 4, 2024. https://journal.unj.ac.id/unj/index.php/spatial/article/view/212.