1. Distinguishing Charity as Goodness and Prudence as Rightness: A Key to Thomas's;Keenan;Secunda Pars” The Thomist,1992
2. John Paul II , Pope Sollicitudo Rei Socialis 1987 http://www.vatican.va/holy_father/john_paul_ii/encyclicals/documents/hf_jp-ii_enc_30121987_sollicitudo-rei-socialis_en.html
3. Pope , Stephen J.