O'Malley, J. W. (1983). The fourth vow in its Ignatian context: A historical study. American Assistancy Seminar.
Chicago-referens (17:e uppl.)O'Malley, John W. The Fourth Vow in Its Ignatian Context: A Historical Study. St. Louis, Mo.: American Assistancy Seminar, 1983.
MLA-referens (8:e uppl.)O'Malley, John W. The Fourth Vow in Its Ignatian Context: A Historical Study. American Assistancy Seminar, 1983.
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