Sartika, N.Y. and Sugiharsono, S. 2020. Self-Efficacy and Intensity of the Use of Social Media on Consumption Behavior: Case Study in the Economics Faculty of Yogyakarta State University. Jurnal Economia. 16, 1 (Apr. 2020), 71–85. DOI:https://doi.org/10.21831/economia.v16i1.27067.