Roetter, C. (1963). The diplomatic art, an informal history of world diplomacy. Macrae Smith.
Lua i Stíl Chicago (17ú heag.)Roetter, Charles. The Diplomatic Art, an Informal History of World Diplomacy. Philadelphia: Macrae Smith, 1963.
Lua MLA (9ú heag.)Roetter, Charles. The Diplomatic Art, an Informal History of World Diplomacy. Macrae Smith, 1963.
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