SALES, R. [. (1978). Children's Britannica 9: Helen of troy - ivy. Encyclopaedia Britannica International.
Lua i Stíl Chicago (17ú heag.)SALES, Robin [Ed.]. Children's Britannica 9: Helen of Troy - Ivy. London: Encyclopaedia Britannica International, 1978.
Lua MLA (9ú heag.)SALES, Robin [Ed.]. Children's Britannica 9: Helen of Troy - Ivy. Encyclopaedia Britannica International, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.