A. M. . Waluyo, E. Prasetyo, and A. . Arizal, “Clasification System of Library Book Based on Similarity of The Book Title Using K-Means Method (case Study Library of Bhayangkara Surabaya)”, J. Electr. Eng. Comput. Sci., vol. 3, no. 1, pp. 395–404, Jun. 2018.