Yulistiani, Isty, and Safitri Mukarromah. “Transaksi Jual Beli Dengan Menggunakan Sistem Member Card Di Warung Makan Sambel Layah Purwokerto”. Jurnal Hukum Ekonomi Syariah 3, no. 2 (November 10, 2020): 97–115. Accessed July 7, 2026. http://jurnalnasional.ump.ac.id/index.php/JHES/article/view/8951.