Galbreath, D. L. (1930). Papal Heraldry. Heffer.
Lua i Stíl Chicago (17ú heag.)Galbreath, Donald Lindsay. Papal Heraldry. Cambridge: Heffer, 1930.
Lua MLA (8ú heag.)Galbreath, Donald Lindsay. Papal Heraldry. Heffer, 1930.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.