Young Lee, Ki, Kyu Ho Kim, Jeong Jin Kang, Sung Jai Choi, Yong Soon Im, and Gyoo Seok Choi. 2018. “A Study on the Psychological Analysis System Using Machine Learning”. International Journal of Engineering & Technology 7 (3.33): 128-30. https://doi.org/10.14419/ijet.v7i3.33.18591.