Ikhsan, Fahrudi, 		Kurnianto, Fahmi, 		Apriyanto, Bejo, AND 		Nurdin, Elan.
" EFFORTS TO IMPROVE THE COMPETENCY OF PROFESSIONALISM TEACHER IN JEMBER REGENCY" <em>Geosfera Indonesia</em> [Online], Volume 1 Number 1 (14 December 2017)