Cita APA (7th ed.)

Shelly, G. B., & Cashman, T. J. a. R. (2008). Systems analysis and design (7th ed.). Thomson.

Cita Chicago (17th ed.)

Shelly, Gary B., i Thomas J and Rosenblatt Cashman. Systems Analysis and Design. 7th ed. Boston, Mass: Thomson, 2008.

Cita MLA (9th ed.)

Shelly, Gary B., i Thomas J and Rosenblatt Cashman. Systems Analysis and Design. 7th ed. Thomson, 2008.