APA Citation

John XXIII, P. (1961). Encyclical letter of his holiness John XXIII by divine providence pope Christianity and social progress. St. Paul Editions.

Chicago Style Citation

John XXIII, Pope. Encyclical Letter of His Holiness John XXIII By Divine Providence Pope Christianity and Social Progress. St. Paul Editions, 1961.

MLA Citation

John XXIII, Pope. Encyclical Letter of His Holiness John XXIII By Divine Providence Pope Christianity and Social Progress. St. Paul Editions, 1961.

Warning: These citations may not always be 100% accurate.