Zacour 1960, p. 32. Zacour, Norman P. (1960). "Talleyrand: The Cardinal of Périgord (1301–1364)". Transactions of the American Philosophical Society. New Series. 50 (7). American Philosophical Society: 1–83. doi:10.2307/1005798. JSTOR1005798.
Zacour 1960, p. 32. Zacour, Norman P. (1960). "Talleyrand: The Cardinal of Périgord (1301–1364)". Transactions of the American Philosophical Society. New Series. 50 (7). American Philosophical Society: 1–83. doi:10.2307/1005798. JSTOR1005798.