Stelsel: Verskil tussen weergawes
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Lyn 33:
* Brian Wilson (2001). ''Soft Systems Methodology—Conceptual model building and its contribution'', J.H.Wiley.
* Beynon-Davies P. (2009). ''Business Information + Systems''. Palgrave, Basingstoke. {{ISBN|978-0-230-20368-6}}
== Eksterne skakels ==
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