“Business Effectiveness of Online Reading Books (E-Books) in the Digital Era for Bina Mandiri University Gorontalo Students: Keefektifan Bisnis Buku Bacaan Online ( E-Book) Era Digital untuk Mahasiswa Universitas Bina Mandiri Gorontalo” (2023) Jurnal Ilmu Manajemen dan Bisnis, 11(1), hlm. 1–11. Tersedia pada: https://journals.ubmg.ac.id/index.php/JIMB/article/view/1117 (Diakses: 3 April 2026).