APA (7th ed.) Zitazioa
Whitten, J. L., Barlow, V. M., & Bentley, L. D. (1989). Systems analysis & design methods (2nd ed.). Irwin.
Chicago Style (17th ed.) Zitazioa
Whitten, Jeffrey L., Victor M. Barlow, eta Lonnie D. Bentley. Systems Analysis & Design Methods. 2nd ed. Homewood, IL: Irwin, 1989.
MLA (9th ed.) Zitazioa
Whitten, Jeffrey L., et al. Systems Analysis & Design Methods. 2nd ed. Irwin, 1989.
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