• Vatican News. “Saint Oscar Romero.” Vatican News, vaticannews.va.
• Franciscan Media. “Saint of the Day: Saint Oscar Arnulfo Romero.” Franciscan Media, franciscanmedia.org.
• Archbishop Romero Trust. “Romero’s Life.” Archbishop Romero Trust, romerotrust.org.uk.
• Catholic News Agency. “Oscar Romero: Martyr and Saint.” Catholic News Agency, catholicnewsagency.com.
• Encyclopaedia Britannica. “St. Óscar Romero.” Britannica, britannica.com.

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