1. Catechism of the Catholic Church
  2. Romans — The Anchor Bible, Joseph A. Fitzmyer, S.J., Doubleday, 1992 [Imprimi potest; Nihil obstat; Imprimatur].
  3. Romans — Sacra Pagina, Daniel J. Harrington, S.J. Editor, Brendan Byrne, S.J., The Liturgical Press, Collegeville, Minnesota, 1996.
  4. Romans and Galatians — The Navarre Bible Texts and Commenatry, Faculty of Tehology of the University of Navarre, Four Courts Press, 1998 [Nihil obstat; Imprimi potest]
  5. Church History, Eusebius (Nicene and Post-Nicene Fathers), Edited by Philip Schaff and Henry Wace, Hendrickson Publishers, 1995.
  6. Romans - St. Ignatius Study Bible, Dr. Scott Hahn, St. Ignatius Press, 2003 [Imprimatur]
  7. Dictionary of the Bible, John L. McKenzie, S.J., Simon & Schuster, New York, 1995 [Imprimi potest; Nihil Obstat; Imprimatur].
  8. Epistle to the Romans, St. John Chrysostom, (Nicene and Post-Nicene Fathers), Edited by Philip Schaff, Hendrickson Publishers, 1995.
  9. The Salvation Controversy, James Akin, Catholic Answers, San Diego, 2001
  10. The Works of Josephus, Flavius Josephus, translated by William Whiston, Hendrickson Publishers, 1998
  11. Christianity and the Roman Empire: Background Texts, Ralph Martin Novak, Trinity Press International, 2001.
  12. The First Christian Centuries: Perspectives on the Early Church, Paul McKechnie, InterVarsity Press, 2001.
  13. Augustus to Constantine: The Rise and Triumph of Christianity in the Roman World, Robert M. Grant, Westminster Press, 2004<
  14. Caesar and Christ, Will Durant, MJF Books, New York, 1944.