5 theories
- 5 theories of love
- 5 theories of aging
- 5 theories of intelligence
- 5 theories of public administration
- 5 theories of the lost colony of roanoke
- 5 theories of punishment
- 5 theories of the origin of the universe
- 5 theories of motivation
- 5 theories of group dynamics
- 5 theories of law
- 5 theories of humor
- 5 theories of culture
- 5 theories of leadership
- 5 theories of ethics
- 5 theories of juvenile delinquency