Butler, T. F. (1890). The principle of authority: Churches and pastors, the Church, its authority. Catholic Truth Society of America.
Lua i Stíl Chicago (17ú heag.)Butler, Thomas F. The Principle of Authority: Churches and Pastors, the Church, Its Authority. St. Paul, Minn.: Catholic Truth Society of America, 1890.
Lua MLA (8ú heag.)Butler, Thomas F. The Principle of Authority: Churches and Pastors, the Church, Its Authority. Catholic Truth Society of America, 1890.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.