R. O. . Yahya, N. H. . Mahmood, D. H. . . Kadir, and S. J. . Aziz, “The Use of Factor Analysis and Cluster Analysis Methods to Identify the Most Crucial Key Factors Influencing the Psychological Stability of University Students”, Polytechnic J. Hum. Soc. Sci., vol. 4, no. 1, pp. 779-789, May 2023.