Soars, L., & Soars, J. (1998). New headway english course: Upper - intermediate student's book. New York: Oxford University Press.
Čikaški stil citiranjaSoars, Liz, i John Soars. New Headway English Course: Upper - Intermediate Student's Book. New York: Oxford University Press, 1998.
MLA način citiranjaSoars, Liz, i John Soars. New Headway English Course: Upper - Intermediate Student's Book. New York: Oxford University Press, 1998.
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