References
- Applebaum, H. (1997). The concept of work, ancient, medieval and modern. University of New York Press.
- Keynes, J. M. (1931/1972). Economic possibilities for our grandchildren. In Essays in persuasion (pp. 358–374). Harcourt, Brace & Company.
- Sahlins, M. (1972). Stone age economics. Aline de Gruyter.