PERIWINKLE BOOKS. (2012). PERIWINKLE GENERAL KNOWLEDGE - BOOK 3. PERIWINKLE PUBLICATIONS.
Čikaški stil citiranja (17. izdanje)PERIWINKLE BOOKS. PERIWINKLE GENERAL KNOWLEDGE - BOOK 3. PERIWINKLE PUBLICATIONS, 2012.
MLA način citiranja (9. izdanje)PERIWINKLE BOOKS. PERIWINKLE GENERAL KNOWLEDGE - BOOK 3. PERIWINKLE PUBLICATIONS, 2012.
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