“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”. Jurnal Ilmu Manajemen dan Bisnis 11, no. 1 (Januari 9, 2023): 1–11. Diakses April 3, 2026. https://journals.ubmg.ac.id/index.php/JIMB/article/view/1117.