1. Shades of grey: guidelines for working with the grey literature in systematic reviews for management and organizational studies;International Journal of Management Reviews,2016
2. Alcohol Concern (2014), Alcohol and the Workplace, available at: http://www.wales.nhs.uk/sitesplus/documents/888/Alcohol and the Workplace.pdf (accessed 7 October 2018).
3. Anderson, P. (2010), A Report on the Impact of Work Place Policies and Programmes to Reduce the Harm Done by Alcohol to the Economy, available at: http://www.faseproject.eu/wwwfaseprojecteu/fase-elements/literature-study-workplace.html (accessed 30 May 2018).
4. Do designated drivers and workplace policies effect alcohol consumption;Journal of Socio-Economics,2012
5. Aviva (2008), UK Employees Admit that Regular Drinking Affects their Jobs, available at: https://www.aviva.com/newsroom/ (accessed 20 December 2018).