Afriyanti, A., Binangkit, I.D. and Hardilawati, W.L. 2021. Analisis Portofolio Saham Optimal Model Markowitz Pada Jakarta Islamic Indeks (JII) Tahun 2016-2020. ECOUNTBIS: Economics, Accounting and Business Journal. 1, 1 (Sep. 2021), 57–72.