APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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