APA-viite (7. p.)
Introduction to systems analysis and design / Hawayszkiewyez,Igor: PHI 4th (4th ed.).
Chicago-viite (17. p.)
Introduction to Systems Analysis and Design / Hawayszkiewyez,Igor: PHI 4th. 4th ed.
MLA-viite (9. p.)
Introduction to Systems Analysis and Design / Hawayszkiewyez,Igor: PHI 4th. 4th ed.
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