Hawryszkiewycz, I. (1998). Introduction to systems analysis and design (4th ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Hawryszkiewycz, Igor. Introduction to Systems Analysis and Design. 4th ed. Sydney ; New York ; New Delhi: Prentice Hall, 1998.
Lua MLA (8ú heag.)Hawryszkiewycz, Igor. Introduction to Systems Analysis and Design. 4th ed. Prentice Hall, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.