Catholic Encyclopedia - St. Apollonia, a virgin, possibly ordained (Bishop Dionysius of Alexandria calls her "parthenos presbytis"), martyr at Alexandria in late 248 or early 249. www.newadvent.org/cathen/01617c.htm
For All the Saints - Illustrated hagiography of St. Apollonia. users.erols.com/saintpat/ss/0209.htm#apol
Patron Saints Index - Profile of St. Apollonia, also known as St. Apolline. Illustrated. Since 1969, her feast has been restricted to local calendars. www.catholic-forum.com/saints/sainta13.htm