Kappel, G. (2011). Web Engineering (1st.). Wiley Publisher.
Lua i Stíl Chicago (17ú heag.)Kappel, Gerti. Web Engineering. 1st. New Delhi: Wiley Publisher, 2011.
Lua MLA (9ú heag.)Kappel, Gerti. Web Engineering. 1st. Wiley Publisher, 2011.
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