ARI WIJAYA, Oscarius Yudhi. Marketing Portfolio in Managing Uncertainty Risk During the Covid-19 Pandemic. International Journal of Economics, Business and Accounting Research (IJEBAR), [S. l.], v. 5, n. 1, p. 596–609, 2021. DOI: 10.29040/ijebar.v5i1.1944. Disponível em: https://jurnal.stie-aas.ac.id/index.php/IJEBAR/article/view/1944. Acesso em: 12 jul. 2025.