ENID, B. (2015). THE SECRET SEVEN: SECRET SEVEN ON THE TRAIL (1st.). HODDER CHILDREN'S BOOKS.
Citazione stile Chigago Style (17a edizione)ENID, BLYTON. THE SECRET SEVEN: SECRET SEVEN ON THE TRAIL. 1st. GREAT BRITAIN: HODDER CHILDREN'S BOOKS, 2015.
Citatione MLA (9a ed.)ENID, BLYTON. THE SECRET SEVEN: SECRET SEVEN ON THE TRAIL. 1st. HODDER CHILDREN'S BOOKS, 2015.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.