HAFIFUDDIN, H.; RATNA TRI HARI S. Pengaruh Biaya Promosi Dan Margin Terhadap Jumlah Nasabah Bank Umum Syariah Periode 2015 - 2018. Indonesian Journal of Economic and Business, [S. l.], v. 1, n. 1, p. 11–24, 2023. Disponível em: https://jurnal.pdpi.or.id/index.php/ijeb/article/view/4. Acesso em: 26 jun. 2026.