“Collaborative Filtering-Based Book Recommendation System Using Matrix Factorization Techniques: A Comparative Study of ALS and SVD” (2025) iJournals:International Journal of Software & Hardware Research in Engineering ISSN:2347-4890, 13(6). Tersedia pada: https://ijournals.in/journal/index.php/ijshre/article/view/356 (Diakses: 22 Oktober 2026).