“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”, JIMB, vol. 11, no. 1, hlm. 1–11, Jan 2023, Diakses: 3 April 2026. [Daring]. Tersedia pada: https://journals.ubmg.ac.id/index.php/JIMB/article/view/1117