1. Ariely, Daniel. 2008. Predictably irrational: the hidden forces that shape our decisions. London: Harper Collins.
2. Caplovitz, David. 1963. The poor pay more: consumer practices of low income families. New York: Free Press of Glencoe.
3. Kahneman, Daniel. 2012. Thinking: fast and slow. London: Penguin.
4. Smith, Adam. 1776. An inquiry into the nature and causes of the wealth of nations. Strahan and Caddell.
5. Thaler, Richard and Cass Sunstein. 2008. Nudge: Improving decisions about health, wealth and happiness. Yale.