WILLIAM, B. (1997). HILLS AND MOUNTAINS (1st.). HODDER CHILDREN'S BOOKS.
Čikaški stil citiranja (17. izdanje)WILLIAM, BRENDA. HILLS AND MOUNTAINS. 1st. GREAT BRITAIN: HODDER CHILDREN'S BOOKS, 1997.
MLA način citiranja (9. izdanje)WILLIAM, BRENDA. HILLS AND MOUNTAINS. 1st. HODDER CHILDREN'S BOOKS, 1997.
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