1. Arbuckle, J. L. (1999). AMOS (Version 4.01) [Computer Software]. Chicago, IL: Smallwaters Corporation.
2. Bono, G., & Froh, J. J. (2009). Gratitude in school: Benefits to students and schools. In R. Gilman, E. S. Huebner, & M. J. Furlong (Eds.), Handbook of positive psychology in schools (pp. 77–88). New York: Routledge.
3. Choi, J., & Yu, M. (2014). Correlates of gratitude disposition in middle school students: Gender differences. Technology and Health Care, 22, 459–466.
4. Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Hillside: Erlbaum.
5. Emmons, R. A. (2007). Thanks! How practicing gratitude can make you happier. NY: Houghton Mifflin Company.