Soars, J., & Soars, L. (2009). New Headway: Upper-Intermediate : Student's Book (New Edition.). Oxford University Press.
Čikaški stil citiranja (17. izdanje)Soars, John, i Liz Soars. New Headway: Upper-Intermediate : Student's Book. New Edition. New York: Oxford University Press, 2009.
MLA način citiranja (9. izdanje)Soars, John, i Liz Soars. New Headway: Upper-Intermediate : Student's Book. New Edition. Oxford University Press, 2009.
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