Tansar, I. A., and T. Ningsih. “Dampak Covid-19 Terhadap Harga Saham Dan Volume Perdagangan PT Garuda Indonesia, Tbk”. Jurnal Computech &Amp; Bisnis (e-Journal), vol. 15, no. 2, Dec. 2021, pp. 143-60, https://jurnal.stmik-mi.ac.id/index.php/jcb/article/view/62.