Hasan, G., & Erni, E. (2023). The Mediating Role of Attitude and Perceived Usefulness in the Relationship between Direct Marketing, Perceived Trust, Perceived Ease of Use, and Purchase Intention. International Journal of Economics Development Research (IJEDR), 4(6), 2922–2938. https://doi.org/10.37385/ijedr.v5i1.3562