APA (7th ed.) Citation

Armstrong, R. J., Hellmann, J. A. W., & Short, W. J. (1999). Francis of Assisi: : early documents. I, The Saint. New City Press.

Chicago Style (17th ed.) Citation

Armstrong, Regis J., J. A. Wayne Hellmann, and William J. Short. Francis of Assisi: : Early Documents. I, The Saint. New York ; London ; Manila: New City Press, 1999.

MLA (9th ed.) Citation

Armstrong, Regis J., et al. Francis of Assisi: : Early Documents. I, The Saint. New City Press, 1999.