Nelmi Sari, Arvina Wahyuni, Muhammad Ikhsan Harahap. Pengaruh Diversifikasi Portofolio Saham Terhadap Risiko dan Return Menggunakan Data Indeks Sektoral BEI . JIMBE [Internet]. 2026 Feb. 4 [cited 2026 Sep. 22];3(6):01-10. Available from: https://malaqbipublisher.com/index.php/JIMBE/article/view/955