Sources that I have found:
1.Burka, J. B., & Yuen, L. M. (1983). Procrastination: why you do it, what to do about it. Reading, Mass.: Addison Wesley Pub. Co.
Description: the books identify the reasons we put off tasks-fears of failure, success, control, separation, and attachment-and their roots in our childhood and adult experiences. Burka and Yuen even provide tips on living and working with the procrastinators you may know.
2.Lieberman, C. (2019, March 25). Why You Procrastinate (It Has Nothing to Do With Self-Control). Retrieved from https://www.nytimes.com/2019/03/25/smarter-living/why-you-procrastinate-it-has-nothing-to-do-with-self-control.html.
Description: the newspaper article investigate the psychological reasons for procrastination and reasons to stay in good mental health.
3.Procrastination – 7 Steps to Cure. (2018). Retrieved from https://www.youtube.com/watch?v=irp5ghCVNAM
Description: the video describes 7 steps to solve procrastination by examing the motivation equation by Piers Steel.
4.Irshad Hussain, Sarwat Sultan, Analysis of procrastination among university students, Procedia – Social and Behavioral Sciences, Volume 5, 2010, Pages 1897-1904, ISSN 1877-0428, https://doi.org/10.1016/j.sbspro.2010.07.385.
Description: the study focused on analyzing the factors of procrastination and its effects on learning of university students. The study concluded that procrastination effects on the academic performance of students in terms of classroom learning and participation in activities, submission of their assignments, preparing for the examinations and achievement.
5. Procrastination. (n.d.). Retrieved from https://www.psychologytoday.com/intl/basics/procrastination.
Description: the website defines the meaning of procrastination and gives three forms of procrastination. other parts of the website offer procrastination tests and report for the extent of procrastination for every tester.