1. ArendtH. (1972). Crises of the Republic: Lying in Politics, Civil Disobedience on Violence, Thoughts on Politics, and Revolution. Harcourt Brace Jovanovich.
2. Armstrong, M. (2003). A Handbook of Human Resource Management Practice (9th ed.). London and Sterling: Kogan Page Publishers.
3. An Evolutionary Approach to Norms
4. AxelrodR. (2006). The Evolution of Cooperation (Revised edition). Basic Books.
5. Denmark