Lumbantoruan MR, Panjaitan HP, Chandra T. THE INFLUENCE OF COVID-19 EVENTS TO VACCINATION ON ABNORMAL RETURN AND TRADING VOLUME ACTIVITY IN IDX30 COMPANIES. JABT [Internet]. 2021Sep.29 [cited 2024Nov.21];2(3):183-9. Available from: https://e-jabt.org/index.php/JABT/article/view/75