Gilkaer, H. T. (1993). The political ideas of St. Birgitta and her Spanish confessor, Alfonso Pecha: Liber Celestis imperatoris ad reges: a mirror of princes. Odense Univ. Press.
Chicago-Zitierstil (17. Ausg.)Gilkaer, Hans T. The Political Ideas of St. Birgitta and Her Spanish Confessor, Alfonso Pecha: Liber Celestis Imperatoris Ad Reges: A Mirror of Princes. Odense: Odense Univ. Press, 1993.
MLA-Zitierstil (9. Ausg.)Gilkaer, Hans T. The Political Ideas of St. Birgitta and Her Spanish Confessor, Alfonso Pecha: Liber Celestis Imperatoris Ad Reges: A Mirror of Princes. Odense Univ. Press, 1993.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.