Andriani, N. and Aryanto, A.W.T. 2021. Pengaruh Brand Ambassador terhadap Keputusan Jamaah Mendaftar Umrah di Biro Alsha Tour Surakarta. Academic Journal of Da’wa and Communication. 2, 2 (Nov. 2021), 271–292. DOI:https://doi.org/10.22515/ajdc.v2i2.3189.