Yusoff, Nasir, Nik NurAzhani Anuar, Wan Nor Arifin, Tahamina Begum, and Faruque Reza. 2018. “Emotional Arousal Substrate in Relation to Eysenck Theory of Extraversion”. International Journal of Engineering & Technology 7 (3.22): 14-20. https://doi.org/10.14419/ijet.v7i3.22.17115.