Corporation, C. B. (1986). The vortex [kasetvideo]. Hong Kong : Educational Film Services.
Čikaški stil citiranja (17. izdanje)Corporation, Canadian Broadcasting. The Vortex [kasetvideo]. Hong Kong : Educational Film Services, 1986.
MLA način citiranja (9. izdanje)Corporation, Canadian Broadcasting. The Vortex [kasetvideo]. Hong Kong : Educational Film Services, 1986.
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