Andriani, Novi, and Ardi Wahyu Tri Aryanto. “Pengaruh Brand Ambassador Terhadap Keputusan Jamaah Mendaftar Umrah Di Biro Alsha Tour Surakarta”. Academic Journal of Da’wa and Communication 2, no. 2 (November 5, 2021): 271–292. Accessed May 8, 2024. https://ejournal.uinsaid.ac.id/index.php/ajdc/article/view/3189.