APA-referens (7:e uppl.)

HAWRYSZKIEWYCZ, I. (1994). Introduction to systems analysis and design.-ed.3. Prentice Hall.

Chicago-referens (17:e uppl.)

HAWRYSZKIEWYCZ, I.T. Introduction to Systems Analysis and Design.-ed.3. Sydney: Prentice Hall, 1994.

MLA-referens (9:e uppl.)

HAWRYSZKIEWYCZ, I.T. Introduction to Systems Analysis and Design.-ed.3. Prentice Hall, 1994.