1. Google Books NGram Viewer. 2019. Accessed December 28, 2021. https://books.google.com/ngrams/graph?content=universal+health+care%2C+single-payer&year_start=1800&year_end=2019&corpus=26&smoothing=3&direct_url=t1%3B%2Cuniversal%20health%20care%3B%2Cc0%3B.t1%3B%2Csingle%20-%20payer%3B%2Cc0.
2. Jones B. Pew Research Center. September, 2020. Accessed December 28, 2021. Increasing share of Americans favor a single government program to provide health care coverage. https://www.pewresearch.org/fact-tank/2020/09/29/increasing-share-of-americans-favor-a-single-government-program-to-provide-health-care-coverage/.
3. Healthcare-Now. Exploring polling for medicare for all. 2018. Accessed December 28, 2021. https://www.healthcare-now.org/cbs-news-poll/.
4. Survey. Merritt Hawkins. August, 2017. Accessed December 29, 2021. https://www.merritthawkins.com/uploadedFiles/mha_singlepayer_press_release_2017(1).pdf.