Armstrong, E. A. (1973). Saint Francis: Nature mystic. University of California Press.
Chicagoスタイル(17版)引用形式Armstrong, Edward Allworthy. Saint Francis: Nature Mystic. Berkeley: University of California Press, 1973.
MLA(9版)引用形式Armstrong, Edward Allworthy. Saint Francis: Nature Mystic. University of California Press, 1973.
警告: この引用は必ずしも正確ではありません.