Simbiosis. University of Puerto Rico, Rio Piedras Campus, Graduate School of Information Sciences & Technology.
Čikaški stil citiranja (17. izdanje)Simbiosis. University of Puerto Rico, Rio Piedras Campus, Graduate School of Information Sciences & Technology.
MLA način citiranja (9. izdanje)Simbiosis. University of Puerto Rico, Rio Piedras Campus, Graduate School of Information Sciences & Technology.
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