SALES, R. [. (1978). Children's Britannica 9: Helen of troy - ivy. Encyclopaedia Britannica International.
Chicagoスタイル(17版)引用形式SALES, Robin [Ed.]. Children's Britannica 9: Helen of Troy - Ivy. London: Encyclopaedia Britannica International, 1978.
MLA(9版)引用形式SALES, Robin [Ed.]. Children's Britannica 9: Helen of Troy - Ivy. Encyclopaedia Britannica International, 1978.
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