Hakim, Chairul, and Komarudin Komarudin. “Self-Efficacy, Locus Of Control, Dan Kompetensi Serta Pengaruhnya Kepada Kinerja: Studi Kasus Pengusaha UMKM Di Kecamatan Darmaraja, Sumedang Barat, Indonesia”. Jurnal Computech & Bisnis (e-Journal), vol. 14, no. 1, June 2020, pp. 52-57, http://jurnal.stmik-mi.ac.id/jcb/article/view/90.