एपीए उद्धरण

Valacich, J. S. (2006). Essentials of systems analysis and design. America: Pearson Prentice Hall.

शिकागो स्टाइल उद्धरण

Valacich, Joseph S. Essentials of Systems Analysis and Design. America: Pearson Prentice Hall, 2006.

एमएलए उद्धरण

Valacich, Joseph S. Essentials of Systems Analysis and Design. America: Pearson Prentice Hall, 2006.