Portašik, R. A. (1998). Slovak Franciscans in America: History of the Holy Savior Vice Province. Franciscan Friars.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPortašik, Richard A. Slovak Franciscans in America: History of the Holy Savior Vice Province. Pittsburgh: Franciscan Friars, 1998.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPortašik, Richard A. Slovak Franciscans in America: History of the Holy Savior Vice Province. Franciscan Friars, 1998.
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