Yusnita Effendy, Mutya. 2024. “Pengaruh Customer Relationship Management Terhadap Loyalitas Jamaah Umroh Pada PT Cahaya Berkah Safar: Al-Ghazi Tour & Travel”. El-Mal: Jurnal Kajian Ekonomi & Bisnis Islam 5 (7):3624–3635. https://doi.org/10.47467/elmal.v5i7.3593.