Delvie Oktavia, dan Amirudin. “The Effects of Liquidity, Profitability and Activity on Stock Price on PT Merck Tbk Period 2013 – 2022”. Journal of Investment Development, Economics and Accounting, Vol. 1, no. 1, Maret 2024, hlm. 39 -, https://www.ojs.ideanusa.com/index.php/JIDEA/article/view/142.