Reference Books:

-Ambassador Morgenthau's Sotry
  by Henry Morgenthau

-German Responsibility in the Armenian Genocide: A Review of the Historical Evidence
  of German Complicity
  by Vahakn N. Dadrian

-Encyclopedia of Genocide
  by Israel W. Charny

-Black Dog of Fate: An American Son Uncovers His Armenian Past
  by Peter Balakian