1. Powering America - The Economic and Workforce Contributions of The U.S. Electric Power Industry, M.J. Bradley & Associates, 2017. https://mjbradley.com/sites/default/files/PoweringAmerica.pdf.
2. Bureau of labor statistics, Occupational Employment Statistics, 2020. https://data.bls.gov/oes/#/home (accessed November 3, 2020).
3. Association of General Contractors of America, 2019 Worker Shortage Survey Analysis, 2019. https://www.agc.org/sites/default/files/Files/Communications/2019%20Worker%20Shortage%20Survey%20Analysis.pdf.
4. Association of General Contractors of America, 2017 Worker Shortage Survey Analysis, 2017. https://www.agc.org/sites/default/files/Files/Communications/2017%20Worker%20Shortage%20Survey%20Analysis.pdf.
5. Miller Electric Company, MEC280-18 Year In Review Newsletter_v3HR, 2018. http://www.mecosafety.com/Hidden%20Site/Oliver/mobile/index.html#p=21 (accessed December 3, 2019).