Ambruzzi, A. (1937). A companion to the Spiritual exercises of Saint Ignatius. Coldwell.
Chicago-viite (17. p.)Ambruzzi, Aloysius. A Companion to the Spiritual Exercises of Saint Ignatius. London: Coldwell, 1937.
MLA-viite (8. p.)Ambruzzi, Aloysius. A Companion to the Spiritual Exercises of Saint Ignatius. Coldwell, 1937.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.