ETHERTON, A. Contact 2: A secondary english course.-- rev. edition. Longman.
Čikaški stil citiranja (17. izdanje)ETHERTON, A.R.B. Contact 2: A Secondary English Course.-- Rev. Edition. London: Longman.
MLA način citiranja (9. izdanje)ETHERTON, A.R.B. Contact 2: A Secondary English Course.-- Rev. Edition. Longman.
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