Guerber, H. A. d. (1986). The Norsemen. Avenel Books.
Chicago Style aipamenaGuerber, Helene Adeline d.1929. The Norsemen. New York: Avenel Books, 1986.
MLA aipamenaGuerber, Helene Adeline d.1929. The Norsemen. Avenel Books, 1986.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.