1. Adams, J. S. (1965). Inequity in social exchange. Advances in Experimental Social Psychology, 2, 267–299.
2. Adams, S. (2014). The companies with the biggest CEO wage gaps. Forbes. Retrieved January 21, 2020, from https://www.forbes.com/pictures/mkl45ejmmj/9-glenn-murphy-ceo-gap-i/#570b408c6ec7.
3. AFL-CIO. (2019). Executive paywatch. Retrieved January 21, 2020, from https://aflcio.org/paywatch.
4. Andersen, S. (2018). No CEO should earn 1,000 times more than a regular employee. The Guardian. Retrieved January 21, 2020, from https://www.theguardian.com/business/2018/mar/18/america-ceo-worker-pay-gap-new-data-what-can-we-do
5. Baker, D., Bivens, J., & Schieder, J. (2019). Reining in CEO compensation and curbing the rise of inequality. Report. Economic Policy Institute. Retrieved January 21, 2020, from https://www.epi.org/publication/reining-in-ceo-compensation-and-curbing-the-rise-of-inequality/.