Heim, B. B. (1978). Heraldry in the catholic church, its origin, customs and laws. van Duren.
Lua i Stíl Chicago (17ú heag.)Heim, Bruno Bernard. Heraldry in the Catholic Church, Its Origin, Customs and Laws. Gerrards Gross: van Duren, 1978.
Lua MLA (8ú heag.)Heim, Bruno Bernard. Heraldry in the Catholic Church, Its Origin, Customs and Laws. van Duren, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.