Bickerton, M. (1992). A Practitioner's Handbook of Requirements Engineering Methods. Oxford University Computing Laboratory.
Lua i Stíl Chicago (17ú heag.)Bickerton, M. A Practitioner's Handbook of Requirements Engineering Methods. Oxford University Computing Laboratory, 1992.
Lua MLA (9ú heag.)Bickerton, M. A Practitioner's Handbook of Requirements Engineering Methods. Oxford University Computing Laboratory, 1992.
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