Bramayuda, Airlangga, and Ikasari Nur Fauziah. “Penerapan Manajemen Hubungan Pelanggan Di Aqiqoh Nurul Hayat Surabaya”. Journal of Islamic Economics Studies and Practices 2, no. 2 (December 31, 2023): 106–115. Accessed October 9, 2025. https://journal.stai-ypbwi.ac.id/index.php/JIESP/article/view/132.