LADYBIRD BOOKS. (2020). PEPPA PIG: PEPPA THE MERMAID. LADYBIRD BOOKS.
Chicagoスタイル(17版)引用形式LADYBIRD BOOKS. PEPPA PIG: PEPPA THE MERMAID. UK: LADYBIRD BOOKS, 2020.
MLA(9版)引用形式LADYBIRD BOOKS. PEPPA PIG: PEPPA THE MERMAID. LADYBIRD BOOKS, 2020.
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