Grolier International. Grolier academic encyclopedia: Vol :3. Grolier International.
Čikaški stil citiranja (17. izdanje)Grolier International. Grolier Academic Encyclopedia: Vol :3. USA: Grolier International.
MLA način citiranja (9. izdanje)Grolier International. Grolier Academic Encyclopedia: Vol :3. Grolier International.
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