Gunawan, H. ., dan I. Hermawan. “STUDI KELAYAKAN BISNIS PENDIRIAN TOKO HANDPHONE NADINE CELL DI MALL BTM”. Economics Learning Experience & Social Thinking Education Journal, vol. 1, no. 1, Maret 2021, hlm. 76-85, https://journal.stiegici.ac.id/index.php/eleste/article/view/209.