APA
Sommerville I. &. S. P., . (1997). Requirements engineering : a good practice guide. John Wiley, Chichester: .
Chicago
Sommerville Ian & Sawyer Pete, . 1997. Requirements engineering : a good practice guide. John Wiley, Chichester: .
Harvard
Sommerville I. &. S. P., . (1997). Requirements engineering : a good practice guide. John Wiley, Chichester: .
MLA
Sommerville Ian & Sawyer Pete, . Requirements engineering : a good practice guide. John Wiley, Chichester: . 1997.