Iparraguirre, I. (1955). A key to the study of the Spiritual exercises (Enlarged edition.). Reprinted by the Hibernian Press].
Chicago-referens (17:e uppl.)Iparraguirre, Ignacio. A Key to the Study of the Spiritual Exercises. Enlarged edition. [Calcutta: Reprinted by the Hibernian Press], 1955.
MLA-referens (8:e uppl.)Iparraguirre, Ignacio. A Key to the Study of the Spiritual Exercises. Enlarged edition. Reprinted by the Hibernian Press], 1955.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.