Aziz Ikko Wanaden Mantofani and Alldila Nadhira Ayu Setyaning (2026) “The Impact of Influencer Marketing on Brand Awareness, Customer Brand Engagement, and Overall Brand Quality: Evidence from Optimum Gym Yogyakarta”, Indonesian Journal of Business Analytics , 6(2), pp. 197–214. doi: 10.55927/ijba.v6i2.16400.