Kusnandar, D., A. Rosyadi, and L. Rinandiyana. “Share Investors’ Competence and Overconfidence in Investment Decision Making”. Jurnal Riset, Vol. 1, no. 2, Sept. 2019, pp. 134 -2, https://ejournal.stiekesatuan.ac.id/index.php/riset/article/view/18.