Cita APA (7th ed.)

Shelly, G. (2008). System analysis and design methods. Cengage Learning.

Cita Chicago (17th ed.)

Shelly, G. System Analysis and Design Methods. New Delhi: Cengage Learning, 2008.

Cita MLA (9th ed.)

Shelly, G. System Analysis and Design Methods. Cengage Learning, 2008.