NenengSusanti, Muhammad Ridhwan, SakinaIchsani, and Mohammad Nugraha. “COMPARATIVE ANALYSIS OF AVERAGE ABNORMAL RETURN, AVERAGE TRADING VOLUME ACTIVITY AND AVERAGE BID-ASK SPREAD BEFORE AND AFTER COVID-19 ANNOUNCEMENT IN INDONESIA (EVENT STUDY ON IDXHIDIV20 INDEX)”. PalArch’s Journal of Archaeology of Egypt / Egyptology 17, no. 10 (January 11, 2021): 2946-2959. Accessed March 14, 2025. https://archives.palarch.nl/index.php/jae/article/view/5430.