Sommerville, I. (1996). Software engineering (5th ed.). Addison-Wesley.
Lua i Stíl Chicago (17ú heag.)Sommerville, Ian. Software Engineering. 5th ed. Wokingham, England: Addison-Wesley, 1996.
Lua MLA (9ú heag.)Sommerville, Ian. Software Engineering. 5th ed. Addison-Wesley, 1996.
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