Smutko, G. (1988). Three contemporary Franciscan documents on the apostolate in light of the Magisterium of the Church. Pontificio Ateneo antoniano.
Chicago-referens (17:e uppl.)Smutko, Gregorio. Three Contemporary Franciscan Documents on the Apostolate in Light of the Magisterium of the Church. Romae: Pontificio Ateneo antoniano, 1988.
MLA-referens (8:e uppl.)Smutko, Gregorio. Three Contemporary Franciscan Documents on the Apostolate in Light of the Magisterium of the Church. Pontificio Ateneo antoniano, 1988.
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