16. McCown, W. (1986). Behaviour of chronic college-student procrastinators: An experimental study. Social Science and Behavioural Documents, 17, 133.

17. Steel, P. (2007), op. cit., p. 77.

18. Ibid.

19. Haycock, L. A. (1993). The cognitive mediation of procrastination: An investigation of the relationship between procrastination and self-efficacy beliefs. (Doctoral dissertation, University of Minnesota, 1993). Dissertation Abstracts International, 54, 2261.

20. Enns, M. W., & Cox, B. J. (2002). The nature and assessment of perfectionism: A critical analysis. In G. L. Flett, & P. L. Hewittt (Eds.), Perfectionism: Theory, research, and treatment (pp. 33–62). Washington, D.C.: American Psychological Association; Slaney, R. B., Rice, K. G., & Ashby, J. S. (2002). A programmatic approach to measuring perfectionism: The Almost Perfect Scales. In G. L. Flett, & P. L. Hewitt (Eds.), Perfectionism: theory, research, and treatment (pp. 63–88). Washington, D.C.: American Psychological Association.

21. Borenstein, S. (2007, January 12). Study is a put off: Scientists research why procrastination is getting worse. USAtoday.com. Retrieved April 17, 2007, from www.usatoday.com/tech/science/2007–01–12-procrastination-study_x.htm.

22. Slaney, R. B., Rice, K. G., & Ashby, J. S. (2002), op. cit.

23. Frost, R. O., Heimberg, R. G., Holt, C. S., Mattia, J. L., & Neubauer, A. L. (1993). A comparison of two measures of perfectionism. Personality and Individual Differences, 14, 119–128.

24. Rice, K. G., & Ashby, J. S. (2007). An efficient method for classifying perfectionists. Journal of Counseling Psychology, 54[1], 72–85.

25. Ibid.

26. Kachgal, M. M, Hansen, L. S., & Nutter, K. J. (2001). Academic procrastination prevention/intervention: Journal of Developmental Education, 25, 14–24.

27. Steel, P. (2007), op. cit.

28. Ibid.

29. Ibid.

30. Ibid., p. 75.

31. Ibid.

32. Hitti, M. (2004). It’s never too late to stop procrastinating. Retrieved March 5, 2008, from www.webmd.com/balance/guide/its-never-too-late-to-stop-procrastinating.

33. Tice, D. M., & Baumeister, R. F. (1997), op. cit.

34. Sirois, F. M. (2007). I’ll look after my health, later: A replication and extension of the procrastination-health model with community-dwelling adults. Personality and Individual Differences, 43[1], 15–26.

35. Bogg, T., & Roberts, B. W. (2004). Conscientiousness and healthrelated behaviors: A meta-analysis of the leading behavioral contributors to mortality. Psychological Bulletin, 130, 887–919.