Baldwin, L. (1987). A call to sanctity: The formation and life of Mother Katherine Drexel. Philadelphia.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBaldwin, Lou. A Call to Sanctity: The Formation and Life of Mother Katherine Drexel. Philadelphia, 1987.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBaldwin, Lou. A Call to Sanctity: The Formation and Life of Mother Katherine Drexel. Philadelphia, 1987.
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