1. Ainsworth, M. D. S., Blehar, M. C., Waters, E., & Wall, S. (1978). Patterns of attachments. Hillsdale, NJ: Erlbaum.
2. Alesina, A., Glaeser, E. L., & Sacerdote, B. (2005). Work and leisure in the U.S. and Europe: Why so different? (NBER Working Papers 11278). Cambridge, MA: National Bureau of Economic Research, Inc.
3. Alkire, S. (2008). Subjective measures of agency. In L. Bruni, F. Comim, & M. Pugno (Eds.), Capabilities and happiness (pp. 254–285). Oxford: Oxford University Press.
4. Amato, P. R., Johnson, D. R., & Booth, A. (2003). Continuity and change in marital quality between 1980 and 2000. Journal of Marriage & Family, 65(1), 1–22.
5. Anderson, C. A., & Bushman, B. J. (2001). Effects of violent video games on aggressive behavior, aggressive cognition, aggressive affect, physiological arousal and prosocial behavior: A meta-analysis. Psychological Science, 12, 353–359.