Zain, Zandy Pratama, Ahmad Efendi, and Ana Satrianti. 2020. “Peran Wujud, Jaminan & Empati Terhadap Pelanggan Pada SPBU Di Sungguminasa”. Study of Scientific and Behavioral Management (SSBM) 1 (3). https://journal3.uin-alauddin.ac.id/index.php/ssbm/article/view/18240.