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CompTIA. (April 21, 2020). Total number of engineering, R&D, and testing services jobs in the United States, from 2009 to 2019 (in millions) [Graph]. In Statista. Retrieved November 30, 2020, from https://www.statista.com/statistics/674156/united-states-engineering-research-testing-services-jobs/
CompTIA. "Total number of engineering, R&D, and testing services jobs in the United States, from 2009 to 2019 (in millions)." Chart. April 21, 2020. Statista. Accessed November 30, 2020. https://www.statista.com/statistics/674156/united-states-engineering-research-testing-services-jobs/
CompTIA. (2020). Total number of engineering, R&D, and testing services jobs in the United States, from 2009 to 2019 (in millions). Statista. Statista Inc.. Accessed: November 30, 2020. https://www.statista.com/statistics/674156/united-states-engineering-research-testing-services-jobs/
CompTIA. "Total Number of Engineering, R&d, and Testing Services Jobs in The United States, from 2009 to 2019 (in Millions)." Statista, Statista Inc., 21 Apr 2020, https://www.statista.com/statistics/674156/united-states-engineering-research-testing-services-jobs/
CompTIA, Total number of engineering, R&D, and testing services jobs in the United States, from 2009 to 2019 (in millions) Statista, https://www.statista.com/statistics/674156/united-states-engineering-research-testing-services-jobs/ (last visited November 30, 2020)
