Lumbantoruan, Martina Rapolo, Harry Patuan Panjaitan, and Teddy Chandra. “THE INFLUENCE OF COVID-19 EVENTS TO VACCINATION ON ABNORMAL RETURN AND TRADING VOLUME ACTIVITY IN IDX30 COMPANIES”. Journal of Applied Business and Technology 2, no. 3 (September 29, 2021): 183-193. Accessed May 19, 2024. https://e-jabt.org/index.php/JABT/article/view/75.