APA সাইটেশন

Otto of Freising. (1953). The deeds of Frederick Barbarossa. New York: Columbia University Press.

শিকাগো স্টাইলে সাইটেশন

Otto of Freising. The Deeds of Frederick Barbarossa. New York: Columbia University Press, 1953.

এমএলএ সাইটেশন

Otto of Freising. The Deeds of Frederick Barbarossa. New York: Columbia University Press, 1953.