• Mother Teresa Center. “Biography of Mother Teresa.” Mother Teresa of Calcutta Center, motherteresa.org.
• The Holy See. “Mother Teresa of Calcutta (1910-1997): Biography.” Vatican website, vatican.va.
• Franciscan Media. “Saint of the Day: Saint Teresa of Calcutta.” Franciscan Media, franciscanmedia.org.
• The Nobel Prize. “Mother Teresa: Facts.” NobelPrize.org, nobelprize.org.
• Encyclopaedia Britannica. “Mother Teresa.” Britannica, britannica.com.

Slides are written from The Acutis Project research packet for St. Teresa of Calcutta, which draws on the sources above. Photo credits appear on each picture.