ISTIQOMAH, Ananda Nadya; 						WARSINI, Sabar.
 Optimal Portfolio Formation Using Single Index Model on the IDX80 Index for the Period February 2021 – May 2022.
<strong>SAR (Soedirman Accounting Review) : Journal of Accounting and Business</strong>, [S.l.], v. 7, n. 2, p. 111-127, dec. 2022.
ISSN 2598-0718.
Available at: &lt;<a href="https://jos.unsoed.ac.id/index.php/sar/article/view/7053" target="_new">https://jos.unsoed.ac.id/index.php/sar/article/view/7053</a>&gt;. Date accessed: 13 may 2025.
doi: <a href="https://doi.org/10.32424/1.sar.2022.7.2.7053">https://doi.org/10.32424/1.sar.2022.7.2.7053</a>.