Briefly summarize each source. State why the source is credible. State how the source is relevant to your research question.. Fagan, C., Norman, H., Smith, M., & Gonzlez Menndez, M. C. (2014). In search of good quality part-time employment. Conditions of Work and Employment Series No. 43. Geneva: International Labour Office. Briefly summarize each source. State why the source is credible. State how the source is relevant to your research question. how a 4-day work week affects employers