Cita APA (7a ed.)

Iglesia Católica & Pío X , P.. (1963). Acerbo nimis: : Encyclical of St. Pius X on the Teaching of Christian Doctrine. : The Confraternity of Christian Doctrine.

Cita Chicago Style (17a ed.)

Iglesia Católica y Papa Pío X. Acerbo Nimis: : Encyclical of St. Pius X on the Teaching of Christian Doctrine. [S.l.]: : The Confraternity of Christian Doctrine, 1963.

Cita MLA (9a ed.)

Iglesia Católica y Papa Pío X. Acerbo Nimis: : Encyclical of St. Pius X on the Teaching of Christian Doctrine. : The Confraternity of Christian Doctrine, 1963.