References
- Ajzen, I. (2012). The Theory of Planned Behavior. In P. van Lange, A. Kruglanski, & T. Higgins (Eds.), In the handbook of theories of social psychology, Vol. 1 (pp. 438–459). London: Sage.
- Griffin, R. (2014). Complete training evaluation: The comprehensive guide to measuring Return on Investment. London: Kogan Page.