Wallwork. (2013). English for Academic Research: Vocabulary Exercises (1.). Springer US.
Čikaški stil citiranja (17. izdanje)Wallwork. English for Academic Research: Vocabulary Exercises. 1. Springer US, 2013.
MLA način citiranja (8. izdanje)Wallwork. English for Academic Research: Vocabulary Exercises. 1. Springer US, 2013.
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