Analisis Keluhan Pelanggan Toserba Pusat Pondok Pesantren Sunan Drajat Dan Strategi Perbaikan Pelayanan. JOURNAL OF SHARIA ECONOMICS, [S. l.], v. 8, n. 1, 2026. DOI: 10.35896/2bp49655. Disponível em: https://journal.uaindonesia.ac.id/index.php/JSE/article/view/1347. Acesso em: 17 jun. 2026.