1. Agata. (2017). 6 time management tips for PhD students. Retrieved January 27, 2019, from
http://blogs.nottingham.ac.uk/studentlife/2017/11/01/6-time-management-tips-phd-students/
.
2. Ali, A., & Kohun, K. (2007). Dealing with social isolation to minimize doctoral attrition—A four stage framework. International Journal of Doctoral Studies, 2(1), 33–49.
3. Azuma, R. T. (2017). So long, and thanks for the PhD! Retrieved February 6, 2018, from
http://www.cs.unc.edu/~azuma/hitch4.html
.
4. Brannock, R. G., Litten, M. J., & Smith, J. (2000). The impact of doctoral study on marital satisfaction. American Counselling Association, 3(2), 123–130.
5. Burns, T., & Sinfield, S. (2016). Essential study skills: The complete guide to success at university (4th ed.). London: Sage Publications.