APA aipamena

Valacich, J. S., George, J. F., & Hoffer, J. A. (2001). Essentials of systems analysis and design. Prentice Hall.

Chicago Style aipamena

Valacich, Joseph S., Joey F. George, and Jeffrey A. Hoffer. Essentials of Systems Analysis and Design. Upper Saddle River, New Jersey: Prentice Hall, 2001.

MLA aipamena

Valacich, Joseph S., et al. Essentials of Systems Analysis and Design. Prentice Hall, 2001.