O'reilly, E. (2008). Project omega: Level 2. Harlow: Pearson Education.
Čikaški stil citiranjaO'reilly, Elaine. Project Omega: Level 2. Harlow: Pearson Education, 2008.
MLA način citiranjaO'reilly, Elaine. Project Omega: Level 2. Harlow: Pearson Education, 2008.
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