PURNOMO, Dwi Tjahjo. APAKAH SAHAM FARMASI DI BURSA EFEK INDONESIA MENGIKUTI HIPOTESIS RANDOM WALK SAAT PANDEMI COVID-19?. Jurnal Riset Ekonomi dan Bisnis, [S. l.], v. 14, n. 1, p. 18–28, 2021. DOI: 10.26623/jreb.v14i1.3170. Disponível em: https://journals.usm.ac.id/index.php/jreb/article/view/3170. Acesso em: 29 jun. 2026.