Abdul Hadi, Muhammad, Eri Besra, and Verinita. 2022. “The Effect of Perceived Risk and Perceived Usefulness on Purchase Intention With Customer Attitude As a Mediation Variable (Survey of Tokopedia Consumers in Padang City)”. Enrichment : Journal of Management 12 (4), 2918-30. https://doi.org/10.35335/enrichment.v12i4.754.