Style de citation APA (7e éd.)

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

Style de citation Chicago (17e éd.)

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

Style de citation MLA (8e éd.)

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