References
- Addams, J. (1990). Twenty years at Hull-House. Chicago, IL: University of Chicago Press.
- Bureau of Consular Affairs. (n.d.). Statistics. Retrieved from https://travel.state.gov/content/adoptionsabroad/en/about-us/statistics.html
- Zong, J., & Batalova, J. (2015, December 1). European immigrants in the United States. Retrieved from http://www.migrationpolicy.org/article/european-immigrants-united-states