Leo I, P., Freeland, J. P., & Conway, A. J. (1995). Sermons. Catholic University of America Press.
芝加哥风格引文Leo I, Pope, Jane Patricia Freeland, 与 Agnes Josephine Conway. Sermons. Washington, D.C.: Catholic University of America Press, 1995.
MLA引文Leo I, Pope, et al. Sermons. Catholic University of America Press, 1995.
警告：这些引文格式不一定是100％准确.