• The Holy See. “Francisco Marto (1908–1919) and Jacinta Marto (1910–1920).”
• Congregation for the Doctrine of the Faith. “The Message of Fatima.”
• Franciscan Media. “Saint of the Day: Saints Jacinta and Francisco Marto.”
• Encyclopaedia Britannica. “Our Lady of Fátima.”
• Shrine of Fátima. “The Little Shepherds: Francisco and Jacinta Marto.”

Slides are written from The Acutis Project research packet for Sts. Francisco and Jacinta Marto, which draws on the sources above. Photo credits appear on each picture.