Einhard. (1960). The life of charlemagne. University of Michigan Press.
Chicago Style (17th ed.) ZitazioaEinhard. The Life of Charlemagne. Ann Arbor: University of Michigan Press, 1960.
MLA (9th ed.) ZitazioaEinhard. The Life of Charlemagne. University of Michigan Press, 1960.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.