Den Neufirlle, R. (1990). Applied Systems Analysis Engineering Planning And Technology Management Richard De Neufirlle. McGraw-Hill.
Chicago-viite (17. p.)Den Neufirlle, Richard. Applied Systems Analysis Engineering Planning And Technology Management Richard De Neufirlle. McGraw-Hill, 1990.
MLA-viite (8. p.)Den Neufirlle, Richard. Applied Systems Analysis Engineering Planning And Technology Management Richard De Neufirlle. McGraw-Hill, 1990.
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