Blyton, E. (2015). The Secret Seven: Secret Seven Mystery (1st.). Hodder Children's Books.
Chicago-viite (17. p.)Blyton, Enid. The Secret Seven: Secret Seven Mystery. 1st. UK: Hodder Children's Books, 2015.
MLA-viite (9. p.)Blyton, Enid. The Secret Seven: Secret Seven Mystery. 1st. Hodder Children's Books, 2015.
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