1. The theory of planned behavior
2. Ajzen, I. (2006). Constructing a Theory of Planned Behavior Questionnaire: Conceptual & Methodological Considerations. Retrieved from www.unix.oit.umass.edu/~aizen/pdf/tpb.measurement.pdf
3. Consumer attitudes and behavior;I.Ajzen;Handbook of Consumer Psychology,2008
4. The influence of attitudes on behavior;I.Ajzen;The Handbook of Attitudes,2005