Riandari, F., H. T. Sihotang, T. Tarigan, and M. . Rafli. “Classification of Book Types Using the Support Vector Machine (SVM) Method”. Jurnal Mantik, vol. 6, no. 1, Mar. 2022, pp. 43-49, https://iocscience.org/ejournal/index.php/mantik/article/view/2132.