Catholic Church. Pope (1922-1939 : Pius XI) & Pius XI, P. Why a retreat?: "Mens nostra," the encyclical of Pope Pius XI on Laymen's retreats. Paulist Press.
Citação do estilo Chicago (17ª ed.)Catholic Church. Pope (1922-1939 : Pius XI) e Pope Pius XI. Why a Retreat?: "Mens Nostra," the Encyclical of Pope Pius XI on Laymen's Retreats. New York: Paulist Press.
Citação MLA (8ª ed.)Catholic Church. Pope (1922-1939 : Pius XI) e Pope Pius XI. Why a Retreat?: "Mens Nostra," the Encyclical of Pope Pius XI on Laymen's Retreats. Paulist Press.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.