Jajan Badruzaman. (2019). Analysis of Comparison of Stock Prices before and after Announcement of Business-27 INDKS (Census on Companies in the Category of Business Index 27 in 2018). Global Journal of Human-Social Science, 19(E5), 35–38. Retrieved from https://socialscienceresearch.org/index.php/GJHSS/article/view/2905