Gunawan, Hendra, and Evelyn Octa Lina. “Mandatory and Voluntary Disclosure of Annual Report on Investor Reaction”. International Journal of Economics and Financial Issues 5, no. 1S (July 23, 2015): 311–314. Accessed April 20, 2025. https://mail.econjournals.org.tr/index.php/ijefi/article/view/1395.