APA (7th ed.) Citation

SALES, R. [. (1978). Children's Britannica 9: Helen of troy - ivy. Encyclopaedia Britannica International.

Chicago Style (17th ed.) Citation

SALES, Robin [Ed.]. Children's Britannica 9: Helen of Troy - Ivy. London: Encyclopaedia Britannica International, 1978.

MLA (9th ed.) Citation

SALES, Robin [Ed.]. Children's Britannica 9: Helen of Troy - Ivy. Encyclopaedia Britannica International, 1978.