ROBERT FREDERICK. (2005). SEVEN WONDERS OF THE WORLD. REALLY USEFUL MAP COMPANY LTD.
Čikaški stil citiranja (17. izdanje)ROBERT FREDERICK. SEVEN WONDERS OF THE WORLD. ENGLAND: REALLY USEFUL MAP COMPANY LTD, 2005.
MLA način citiranja (9. izdanje)ROBERT FREDERICK. SEVEN WONDERS OF THE WORLD. REALLY USEFUL MAP COMPANY LTD, 2005.
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