LADYBIRD BOOKS. (2020). PEPPA PIG: PEPPA'S COUNTDOWN TO BEDTIME. LADYBIRD BOOKS.
Čikaški stil citiranja (17. izdanje)LADYBIRD BOOKS. PEPPA PIG: PEPPA'S COUNTDOWN TO BEDTIME. UK: LADYBIRD BOOKS, 2020.
MLA način citiranja (9. izdanje)LADYBIRD BOOKS. PEPPA PIG: PEPPA'S COUNTDOWN TO BEDTIME. LADYBIRD BOOKS, 2020.
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