Lee. (1999). Introducing Systems Analysis and Design: Combined volume set. Galgotia.
Chicago Style aipamenaLee. Introducing Systems Analysis and Design: Combined Volume Set. New Delhi: Galgotia, 1999.
MLA aipamenaLee. Introducing Systems Analysis and Design: Combined Volume Set. Galgotia, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.