Wolf, G. G. (1975). Friedrich Barbarossa. Wege der Forschung.
Chicago Style (17th ed.) CitationWolf, Gunther G. "Friedrich Barbarossa." Wege Der Forschung 1975.
MLA (8th ed.) CitationWolf, Gunther G. "Friedrich Barbarossa." Wege Der Forschung, 1975.
Warning: These citations may not always be 100% accurate.