Citazione Stile APA (7a Edizione)

Armstrong, E. A. (1973). Saint Francis: Nature mystic. University of California Press.

Citazione stile Chigago Style (17a edizione)

Armstrong, Edward Allworthy. Saint Francis: Nature Mystic. Berkeley: University of California Press, 1973.

Citatione MLA (9a ed.)

Armstrong, Edward Allworthy. Saint Francis: Nature Mystic. University of California Press, 1973.