Choi, Young-Chool, and Ji-Hyun Jang. “Study on Structural Relationships Among the Factors Affecting Happiness of Adolescent in OECD Countries: Application of QCA Method”. Modern Perspectives in Language, Literature and Education Vol. 7 (August 4, 2021): 62–71. Accessed June 9, 2026. https://stm.bookpi.org/MPLLE-V7/article/view/2872.