Gaya APA
Balbulus, E, &, N. (-1969).
Two lives of Charlemagne, transl. with an introd.by Lewis Thorpe. .
Harmondsworth:
Penguin.
Gaya MLA
Balbulus, Einhardus, &, Notkerus.
"Two lives of Charlemagne, transl. with an introd.by Lewis Thorpe. ".
Harmondsworth:
Penguin,
-1969.
Buku.