SEMPREVIVO PHILIP G. (1982). SYSTEMS ANALYSIS.DEFINATIONS PROCESS AND DESIGN (2ND.). SCIENCE RESEARCH.
Chicago (17e ed.) BronvermeldingSEMPREVIVO PHILIP G. SYSTEMS ANALYSIS.DEFINATIONS PROCESS AND DESIGN. 2ND. I B M: SCIENCE RESEARCH, 1982.
MLA (9e ed.) BronvermeldingSEMPREVIVO PHILIP G. SYSTEMS ANALYSIS.DEFINATIONS PROCESS AND DESIGN. 2ND. SCIENCE RESEARCH, 1982.
Let op: Deze citaties zijn niet altijd 100% accuraat.