R. A. Yuana, D. Harjunowibowo, N. A. Karyanta, and C. W. Budiyanto, “Data Similarity Filtering of Wartegg Personality Test Result using Cosine-Similarity”, Int. J. Recent Contrib. Eng. Sci. IT, vol. 6, no. 3, pp. pp. 19–28, Nov. 2018.