Gower, R. (2002). Grammar in practice 1 (First edition.). Cambridge University Press.
Čikaški stil citiranja (17. izdanje)Gower, Roger. Grammar in Practice 1. First edition. Cambridge: Cambridge University Press, 2002.
MLA način citiranja (9. izdanje)Gower, Roger. Grammar in Practice 1. First edition. Cambridge University Press, 2002.
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