Hansen, W. G. (1971). St. Francis of Assisi: Patron of the environment. Franciscan Herald Press.
Chicago Style aipamenaHansen, Warren G. St. Francis of Assisi: Patron of the Environment. Chicago, Ill.: Franciscan Herald Press, 1971.
MLA aipamenaHansen, Warren G. St. Francis of Assisi: Patron of the Environment. Franciscan Herald Press, 1971.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.