1. Personality, self-concept, interests, and intelligence: which construct doesn’t fit?;Ackerman;J Pers,1997
2. Existence, relatedness and growth;Alderfer,1972
3. Reversal theory: the dynamics of motivation;Apter,2007
4. Aristotle, 1985. Nicomachean ethics. (T. Irwin, Trans.). Indianapolis, IN: Hackett.
5. An introduction to motivation;Atkinson,1964