Mulyaningsih, M. (2021) “Analysis of Covid-19 Impact on Stock’s Abnormal Return in Sub Cigarette Sector Companies Listed on BEI”, Journal of Social Transformation and Regional Development, 3(1), pp. 70–84. Available at: https://journal.uthm.edu.my/index.php/jstard/article/view/7604 (Accessed: 13 August 2026).