Urdang international. (2020). Urdang international Summer Schools. Theurdang international.
Čikaški stil citiranja (17. izdanje)Urdang international. Urdang International Summer Schools. London: Theurdang international, 2020.
MLA način citiranja (9. izdanje)Urdang international. Urdang International Summer Schools. Theurdang international, 2020.
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