Mulyaningsih M, Hartini S, Anggraeni R, Mahendra DP. Analysis of Covid-19 Impact on Stock’s Abnormal Return in Sub Cigarette Sector Companies Listed on BEI. jstard [Internet]. 2021 Jun. 28 [cited 2024 Jul. 1];3(1):70-84. Available from: https://publisher.uthm.edu.my/ojs/index.php/jstard/article/view/7604