Syasa Anbar Pratiwi. “Analysis of External Factors Affecting Purchasing Decisions of Scarlett Whitening Products Through the Shopee Platform Using the PESTEL Model : A Study of Students at the University of Sumatera Utara, Medan”. International Journal of Economics and Management Research, vol. 5, no. 1, Jan. 2026, pp. 490-09, doi:10.55606/ijemr.v5i1.685.