1. Self-efficacy: Toward a unifying theory of behavioral change;Bandura;Psychological Review,1977
2. Bandura, A. (1986). Social foundations of thought and action: A social cognitive theory. Englewood Cliffs, NJ: Prentice-Hall
3. Bandura, A. (1997). Self-efficacy: The exercise of control. New York: W.H. Freeman
4. Bosscher, R.J., Smit, J.H., & Kempen, G.J.Th.I. (1997). Algemene competentieverwachtingen bij ouderen: Een onderzoek naar de psychometrische kenmerken van de algemene competentieschaal (Expectations of general self-efficacy in elderly persons: Investigating psychometric characteristics of the General Self-Efficacy Scale). Nederlands Tijdschrift voor de Psychologie, 52, 239–248
5. Constructing validity: Basic issues in objective scale development;Clark;Psychological Assessment,1995