Steele, F. M. (1921). The life of Saint Walburga. Heath Cranton.
Chicago Style aipamenaSteele, Francesca Maria. The Life of Saint Walburga. London: Heath Cranton, 1921.
MLA aipamenaSteele, Francesca Maria. The Life of Saint Walburga. Heath Cranton, 1921.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.