Cita APA

 Valacich, J. S. (2015).  Essentials of systems analysis and design.  Pearson Educational Limited.

Citación estilo Chicago

 Valacich, Joseph S.  Essentials of Systems Analysis and Design.  Pearson Educational Limited, 2015.

Cita MLA

 Valacich, Joseph S.  Essentials of Systems Analysis and Design.  Pearson Educational Limited, 2015.

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