DAVID WALLIAMS. (2015). THE AMAZING ADVENTURES: GRANDPA'S GREAT ESCAPE. HARPERCOLLINS CHILDREN'S BOOKS.
Chicago-viite (17. p.)DAVID WALLIAMS. THE AMAZING ADVENTURES: GRANDPA'S GREAT ESCAPE. LONDON: HARPERCOLLINS CHILDREN'S BOOKS, 2015.
MLA-viite (9. p.)DAVID WALLIAMS. THE AMAZING ADVENTURES: GRANDPA'S GREAT ESCAPE. HARPERCOLLINS CHILDREN'S BOOKS, 2015.
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