3G E-Learning LLC. (2018). Systems analysis and design. 3G E-Learning LLC.
Čikaški stil citiranja (17. izdanje)3G E-Learning LLC. Systems Analysis and Design. New York, NY: 3G E-Learning LLC, 2018.
MLA način citiranja (9. izdanje)3G E-Learning LLC. Systems Analysis and Design. 3G E-Learning LLC, 2018.
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