The "Social Gospel" of Pope John Paul II : a guide to the Encyclicals on human work and the authentic development of peoples / Franco Biffi. - Biffi, Franco, sac. (OLS)http://pul/name/837; Ekong, Silvester G. (OLS)http://pul/name/2127 (Pontifical Lateran University, 1989)
"English translation by Dr. Sylvester G. Ekong".