Catholic Encyclopedia - Article on St. Macrina the Elder. www.newadvent.org/cathen/09508b.htm
For All the Saints - St. Macrina the Elder, d. around 340, was the mother of one saint and the grandmother of four more, including two of the Cappadocian Fathers. users.erols.com/saintpat/ss/0114.htm#macr
One Year Book of Saints - Short biography of St. Macrina the Elder, by Clifford Stevens. www.ewtn.com/library/MARY/MACRINA.htm