Graphis. (1967). Children's books illustration: Illustration des livres d'enfants - Kinderbuchillustrationen. The Graphis Press.
Lua i Stíl Chicago (17ú heag.)Graphis. Children's Books Illustration: Illustration Des Livres D'enfants - Kinderbuchillustrationen. [Zurich]: The Graphis Press, 1967.
Lua MLA (9ú heag.)Graphis. Children's Books Illustration: Illustration Des Livres D'enfants - Kinderbuchillustrationen. The Graphis Press, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.