Prokopp, M. (1989). Giotto. Henschelverlag.
Lua i Stíl Chicago (17ú heag.)Prokopp, Mária. Giotto. Berlin: Henschelverlag, 1989.
Lua MLA (8ú heag.)Prokopp, Mária. Giotto. Henschelverlag, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.