APA (7th ed.) Citation

Hansen, W. G. (1971). St. Francis of Assisi: Patron of the environment. Franciscan Herald Press.

Chicago Style (17th ed.) Citation

Hansen, Warren G. St. Francis of Assisi: Patron of the Environment. Chicago, Ill.: Franciscan Herald Press, 1971.

MLA (8th ed.) Citation

Hansen, Warren G. St. Francis of Assisi: Patron of the Environment. Franciscan Herald Press, 1971.