1. https://obamawhitehouse.archives.gov/blog/2009/01/21/president-barack-obamas-inaugural-address
2. www.sovlit.net
3. www.law.cornell.edu/uscode/text/4/4.
4. www.britannica.com/topic/Wilhelm-Meisters-Apprenticeship
5. www.britannica.com/event/American-Civil-War/The-cost-and-significance-of-the-Civil-War