APA (7th ed.) Citation

Frederick I, H. R. E., & Loud, G. A. (2010). The crusade of Frederick Barbarossa: The history of the expedition of the Emperor Frederick and related texts. Ashgate.

Chicago Style (17th ed.) Citation

Frederick I, Holy Roman Emperor, and G. A. Loud. The Crusade of Frederick Barbarossa: The History of the Expedition of the Emperor Frederick and Related Texts. Farnham, Surrey, England ; Burlington, VT: Ashgate, 2010.

MLA (9th ed.) Citation

Frederick I, Holy Roman Emperor, and G. A. Loud. The Crusade of Frederick Barbarossa: The History of the Expedition of the Emperor Frederick and Related Texts. Ashgate, 2010.