APA (7th ed.) Citation

Friedrich II. Heiliges Römisches Reich, K., & Petrus de Vinea. (1991). Friderici II. Imperatoris Epistulae. Weidmann.

Chicago Style (17th ed.) Citation

Friedrich II. Heiliges Römisches Reich, Kaiser, and Petrus de Vinea. Friderici II. Imperatoris Epistulae. Hildesheim: Weidmann, 1991.

MLA (9th ed.) Citation

Friedrich II. Heiliges Römisches Reich, Kaiser, and Petrus de Vinea. Friderici II. Imperatoris Epistulae. Weidmann, 1991.

Warning: These citations may not always be 100% accurate.