Παραπομπή APA
Fitzgerald, J., Fitzgerald, A. F., & Stallings, W. D. (1981). Fundamentals of systems analysis (2nd ed.). New York: John Wiley & Sons.
Παραπομπή Chicago StyleFitzgerald, Jerry., Ardra F. Fitzgerald, and Warren D. Stallings. Fundamentals of Systems Analysis. 2nd ed. New York: John Wiley & Sons, 1981.
Παραπομπή MLAFitzgerald, Jerry., Ardra F. Fitzgerald, and Warren D. Stallings. Fundamentals of Systems Analysis. 2nd ed. New York: John Wiley & Sons, 1981.
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