1. National Nursing Research Institute: King's College London. Nurses in society. Starting the debate. https://www.kcl.ac.uk/nursing/research/nnru/publications/Reports/Nursesinsocietywrittenevidence.pdf.
2. The occupational status of nurses;Devereux;Am Sociol Rev,1950
3. Facts on the Nursing Shortage in North America. https://www.nursingsociety.org/Media/Pages/shortage.aspx.