Cita APA (7th ed.)

Kotonya, G., & Sommerville, I. (1998). Requirements engineering: Processes and techniques. John Wiley.

Cita Chicago (17th ed.)

Kotonya, Gerald, i Ian Sommerville. Requirements Engineering: Processes and Techniques. Chichester: John Wiley, 1998.

Cita MLA (8th ed.)

Kotonya, Gerald, i Ian Sommerville. Requirements Engineering: Processes and Techniques. John Wiley, 1998.