Blyton, E. (2015). The Secret Seven: Secret Seven Mystery (1st.). Hodder Children's Books.
Citazione stile Chigago Style (17a edizione)Blyton, Enid. The Secret Seven: Secret Seven Mystery. 1st. UK: Hodder Children's Books, 2015.
Citatione MLA (9a ed.)Blyton, Enid. The Secret Seven: Secret Seven Mystery. 1st. Hodder Children's Books, 2015.
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