1. Dubin, R. (1992). Central life interests: Creative individualism in a complex world. Transaction.
2. Hamilton-Smith, E. (1995, March 4–9). The connexions of scholarship. Newsletter (Official newsletter of RC13 of the International Sociological Association.
3. Huizinga, J. (1955). Homo ludens: A study of the play element in culture. Beacon.
4. Kaplan, M. (1960). Leisure in America: A social inquiry. Wiley.
5. Lee, K. J., & Hwang, S. (2018). Serious leisure qualities and subjective well-being. Journal of Positive Psychology, 13(1), 48–56. https://doi.org/10.1080/17439760.2017.1374437