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2. Attitudes, Personality and Behavior;Ajzen,1988
3. The theory of planned behavior;Ajzen;Organizational Behavior and Human Decision Process,1991
4. Nature and operation of attitudes;Ajzen;Annual Review of Psychology,2001
5. Ajzen, I., 2002. Constructing a TPB questionnaire: conceptual and methodological considerations (on-line). Available at: http://www.unix.oit.umass.edu.