Germany
Books:
Charny, I. W. (1999). Encyclopedia of genocide. Santa Barbara, Calif: ABC-CLIO.
Dwork, D., & Pelt, R. J. (2002). Holocaust: A history. New York: Norton.
Megargee, G. P., & United States Holocaust Memorial Museum. (2009). The United States Holocaust Memorial Museum encyclopedia of camps and ghettos, 1933-1945. Bloomington: Indiana University Press.
Websites: