Liguori, Alfonso Maria dei
- Biography of the founder of the Redemptorists, critique of his moral theology. In the 1911 Encyclopædia Britannica. Has a few scanner errors.
- http://www.1911encyclopedia.org/Alfonso_Maria_Dei_Liguori

St. Alphonsus
- Pious hagiography.
- http://www.catholic.org/saints/saint.php?saint_id=256

Alphonsus Liguori, Saint
- Brief biographical entry in the Columbia Encyclopedia.
- http://www.bartleby.com/65/al/Alphonsu.html

Saint Alphonsus Liguori
- Illustrated biography, courtesy of the Alphonsianum, in Rome.
- http://www.alfonsiana.edu/EN%20-%20Alphonsus.htm

Vietnamese Eucharistic Youth Society: St. Alphonsus Liguori
- The story of the saint's life. Suitable for children.
- http://www.tntt.org/vni/tlieu/saints/St0801.htm

Catholic Encyclopedia: St. Alphonsus Liguori
- Long biographical article on the founder of the Redemptorists and devotional writer.
- http://www.newadvent.org/cathen/01334a.htm

Alphonsus Maria de Liguori
- Illustrated profile.
- http://www.catholic-forum.com/saints/sainta09.htm