Djianto, N. N. N., Tjahyana, L. J., & Wijayanti, C. A. (2025). The Effectiveness of Eca Aura as Brand Ambassador for Derma Angel Among the People of Surabaya. Journal of Content and Engagement, 3(2), 131–146. https://doi.org/10.9744/joce.3.2.131-146