Kotonya, G., & Sommerville, I. (1998). Requirements engineering: Processes and techniques. John Wiley.
Chicago Style (17. basım) AtıfKotonya, Gerald, ve Ian Sommerville. Requirements Engineering: Processes and Techniques. Chichester: John Wiley, 1998.
MLA (8th ed.) AtıfKotonya, Gerald, ve Ian Sommerville. Requirements Engineering: Processes and Techniques. John Wiley, 1998.
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