Cita APA (7th ed.)

Valacich, J. S., George, J., & Hoffer, J. A. (2012). Essentials of systems analysis and design (5th ed, international ed.). Prentice Hall.

Cita Chicago (17th ed.)

Valacich, Joseph S., Joey George, i Jeffrey A. Hoffer. Essentials of Systems Analysis and Design. 5th ed, international ed. Upper Saddle River, New Jersey: Prentice Hall, 2012.

Cita MLA (9th ed.)

Valacich, Joseph S., et al. Essentials of Systems Analysis and Design. 5th ed, international ed. Prentice Hall, 2012.