• Vatican News. “Saint José Sánchez del Río.” Vatican News, vaticannews.va.
• Franciscan Media. “Saint of the Day: Saint José Sánchez del Río.” Franciscan Media, franciscanmedia.org.
• Catholic News Agency. “St. José Sánchez del Río: The 14-Year-Old Martyr of the Cristero War.” Catholic News Agency, catholicnewsagency.com.
• The Holy See. “Canonization Mass Homily, October 16, 2016.” Vatican website, vatican.va.
• Encyclopaedia Britannica. “Cristero Rebellion.” Britannica, britannica.com.

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