Justina Ade Yudiarni http://www.unmul.ac.id/ Faculty of Economics, Mulawarman University, Samarinda 75516 East Kalimantan Indonesia
Faculty of Economics, Mulawarman University, Samarinda
Irwan Irwan http://www.unmul.ac.id/ Faculty of Forestry, Mulawarman University, Samarinda 75516 East Kalimantan Indonesia
Faculty of Forestry, Mulawarman University, Samarinda