SOMMERVILLE IAN. (1996). SOFTWARE ENGG, 5TH ED. -.
Cita Chicago (17th ed.)SOMMERVILLE IAN. SOFTWARE ENGG, 5TH ED. HARLOW ENGLAND: -, 1996.
Cita MLA (9th ed.)SOMMERVILLE IAN. SOFTWARE ENGG, 5TH ED. -, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.