APA
[Pius XII P., . (1955). Musicae sacrae disciplina = On sacred music : encyclical letter of His Holiness Pope Pius XII, December 25, 1955. Washington: National Catholic Welfare Conference.
Chicago
[Pius XII Pope], . 1955. Musicae sacrae disciplina = On sacred music : encyclical letter of His Holiness Pope Pius XII, December 25, 1955. Washington: National Catholic Welfare Conference.
Harvard
[Pius XII P., . (1955). Musicae sacrae disciplina = On sacred music : encyclical letter of His Holiness Pope Pius XII, December 25, 1955. Washington: National Catholic Welfare Conference.
MLA
[Pius XII Pope], . Musicae sacrae disciplina = On sacred music : encyclical letter of His Holiness Pope Pius XII, December 25, 1955. Washington: National Catholic Welfare Conference. 1955.
