- ---. “Estimated Market Sizes for Selected Clean Energy Technologies by Technology and Region, 2020-2050 – Charts – Data & Statistics”. World Energy Outlook 2021, International Energy Agency (IEA), 10 Nov. 2021, https://www.iea.org/data-and-statistics/charts/estimated-market-sizes-for-selected-clean-energy-technologies-by-technology-and-region-2020-2050.
- American Chemical Society. “National Historic Chemical Landmark: Development of the Pennsylvania Oil Industry”. ACS: Chemistry for Life, 23 Feb. 2013, http://archive.ph/bEEU7.
- “Employment, Hours, and Earnings from the Current Employment Statistics Survey (National): All Employees, Thousands, Coal Mining, Seasonally Adjusted”. Bureau of Labor Statistics, https://data.bls.gov/timeseries/CES1021210001. Accessed 29 Dec. 2021.
- Ingraham, Christopher. “Analysis | The Entire Coal Industry Employs Fewer People than Arby’s”. Washington Post, 31 Mar. 2017. www.washingtonpost.com, https://www.washingtonpost.com/news/wonk/wp/2017/03/31/8-surprisingly-small-industries-that-employ-more-people-than-coal/.
- REN21. RENEWABLES 2019 GLOBAL STATUS REPORT. REN21, 2019, https://www.ren21.net/gsr-2019.
- Reilly, Michael. “Can We Really Retrain Coal Workers for Jobs in Solar?”. MIT Technology Review, Nov. 2016, https://www.technologyreview.com/2016/08/11/158370/can-we-really-retrain-coal-workers-for-jobs-in-solar/.
- Tomer, Adie, et al. How Renewable Energy Jobs Can Uplift Fossil Fuel Communities and Remake Climate Politics. Brookings, 19 Feb. 2021, https://www.brookings.edu/research/how-renewable-energy-jobs-can-uplift-fossil-fuel-communities-and-remake-climate-politics/.
- Volcovici, Valerie. “Awaiting Trump’s Coal Comeback, Miners Reject Retraining”. Reuters, 1 Nov. 2017. www.reuters.com, https://www.reuters.com/article/us-trump-effect-coal-retraining-insight-idUSKBN1D14G0.