APA

John Paul II P. 1., Catholic Church. Pope (1978-2005 : John Paul II), .Encyclical letter Sollicitudo rei socialis of the supreme pontiff, John Paul II, to the bishops, priests, religious families, sons and daughters of the church and all people of good will for the twentieth anniversity of Populorum progressio. Nairobi,Kenya: 1987.

Chicago

John Paul II Pope 1920, Catholic Church. Pope (1978-2005 : John Paul II), .Encyclical letter Sollicitudo rei socialis of the supreme pontiff, John Paul II, to the bishops, priests, religious families, sons and daughters of the church and all people of good will for the twentieth anniversity of Populorum progressio. Nairobi,Kenya: 1987.

Harvard

John Paul II P. 1., Catholic Church. Pope (1978-2005 : John Paul II), .Encyclical letter Sollicitudo rei socialis of the supreme pontiff, John Paul II, to the bishops, priests, religious families, sons and daughters of the church and all people of good will for the twentieth anniversity of Populorum progressio. Nairobi,Kenya: 1987.

MLA

John Paul II Pope 1920, Catholic Church. Pope (1978-2005 : John Paul II), .Nairobi,Kenya: 1987. .