Roetter, C. (1963). The diplomatic art, an informal history of world diplomacy. Macrae Smith.
Dyfyniad Arddull ChicagoRoetter, Charles. The Diplomatic Art, an Informal History of World Diplomacy. Philadelphia: Macrae Smith, 1963.
Dyfyniad MLARoetter, Charles. The Diplomatic Art, an Informal History of World Diplomacy. Macrae Smith, 1963.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.