PARRAGON BOOKS. (2019). EXPLORE THE WORLD OF BIRDS & MAMMALS (2016 Ed.). PARRAGON BOOK PUBLISHERS.
Lua i Stíl Chicago (17ú heag.)PARRAGON BOOKS. EXPLORE THE WORLD OF BIRDS & MAMMALS. 2016 Ed. LONDON: PARRAGON BOOK PUBLISHERS, 2019.
Lua MLA (9ú heag.)PARRAGON BOOKS. EXPLORE THE WORLD OF BIRDS & MAMMALS. 2016 Ed. PARRAGON BOOK PUBLISHERS, 2019.
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