Shortened footnote and citation:
{{sfn | Unbehauen | 1997 | p=}}

* {{cite book | last=Unbehauen | first=Heinz | title=Regelungstechnik | publisher=Vieweg | publication-place=Braunschweig | date=1997-01 | isbn=3-528-83332-7 | language=de}}


Named reference:
<ref name="z387">{{cite book | last=Unbehauen | first=Heinz | title=Regelungstechnik | publisher=Vieweg | publication-place=Braunschweig | date=1997-01 | isbn=3-528-83332-7 | language=de | page=}}</ref>