Ullmann, W. (1976). The legal validity of the papal electoral pacts. The papacy and political ideas in the middle ages, 3-35.
Cita Chicago Style (17a ed.)Ullmann, Walter. "The Legal Validity of the Papal Electoral Pacts." The Papacy and Political Ideas in the Middle Ages 1976: 3-35.
Cita MLA (8a ed.)Ullmann, Walter. "The Legal Validity of the Papal Electoral Pacts." The Papacy and Political Ideas in the Middle Ages, 1976, pp. 3-35.
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