1. Acosta, J. ve Collinson, S. (2014). “Obama: You can come out of the shadows”, CNN.
2. Bailey, C. J. (2016). US Climate Change Policy, Routledge, New York.
3. Beckett, L. (2018). “Republicans eye compromise on guns-but most resist assault weapons ban”, The Guardian.
4. Borger, J. (2017). “Trump drops climate change from US national security strategy”, The Guardian.
5. Cornell Law School: https://www.law.cornell.edu/wex/second_amendment, Erişim tarihi: 28.03.2020.