Burks, R. (1961). Some elements of East European history. American Historical Assoc., Service Center for Teachers of History.
Citazione stile Chigago Style (17a edizione)Burks, R.V. Some Elements of East European History. Washington, DC: American Historical Assoc., Service Center for Teachers of History, 1961.
Citatione MLA (9a ed.)Burks, R.V. Some Elements of East European History. American Historical Assoc., Service Center for Teachers of History, 1961.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.