APA

Pius PP, . (1943). Encyclical letter of his Holiness Pius XII by divine providence Pope to our venerable brethren, patriarchs, primates, archbishops [...] on the mystical body of Christ and our union in it with Christ. [Città del Vaticano]: Tipografia Poliglotta Vaticana.

Chicago

Pius PP, . 1943. Encyclical letter of his Holiness Pius XII by divine providence Pope to our venerable brethren, patriarchs, primates, archbishops [...] on the mystical body of Christ and our union in it with Christ. [Città del Vaticano]: Tipografia Poliglotta Vaticana.

Harvard

Pius PP, . (1943). Encyclical letter of his Holiness Pius XII by divine providence Pope to our venerable brethren, patriarchs, primates, archbishops [...] on the mystical body of Christ and our union in it with Christ. [Città del Vaticano]: Tipografia Poliglotta Vaticana.

MLA

Pius PP, . Encyclical letter of his Holiness Pius XII by divine providence Pope to our venerable brethren, patriarchs, primates, archbishops [...] on the mystical body of Christ and our union in it with Christ. [Città del Vaticano]: Tipografia Poliglotta Vaticana. 1943.