Ray, C. (1977). Background to children's books. National Book League.
Lua i Stíl Chicago (17ú heag.)Ray, Colin. Background to Children's Books. London: National Book League, 1977.
Lua MLA (8ú heag.)Ray, Colin. Background to Children's Books. National Book League, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.