Sartika, Nyimas Yuhanis, and Sugiharsono Sugiharsono. “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, vol. 16, no. 1, Apr. 2020, pp. 71-85, doi:10.21831/economia.v16i1.27067.