APA način citiranja (7. izdanje)

Hilliard, C. English as a vocation. Oxford University Press.

Čikaški stil citiranja (17. izdanje)

Hilliard, Christopher. English as a Vocation. Oxford University Press.

MLA način citiranja (8. izdanje)

Hilliard, Christopher. English as a Vocation. Oxford University Press.

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