Gaya APA

Dennis, A, W, B, H, R, R, M. (1997). System analysis and design methods (4). United Stated of Amerika: Wiley Publishing.

Gaya MLA

Dennis, Alan.,, Wixom,, Barbara, Haley.,, Roth,, Roberta, M.. "System analysis and design methods". 4 United Stated of Amerika: Wiley Publishing, 1997. Text.