Lejk, M. (2002). An introduction to systems analysis techniques. Addison-Wesley.
Čikaški stil citiranja (17. izdanje)Lejk, Mark. An Introduction to Systems Analysis Techniques. Addison-Wesley, 2002.
MLA način citiranja (8. izdanje)Lejk, Mark. An Introduction to Systems Analysis Techniques. Addison-Wesley, 2002.
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