Não informado. (1977). National Gallery Technical Bulletin. National Gallery.
Lua i Stíl Chicago (17ú heag.)Não informado. National Gallery Technical Bulletin. London: National Gallery, 1977.
Lua MLA (8ú heag.)Não informado. National Gallery Technical Bulletin. National Gallery, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.