Shortened footnote and citation:
{{sfn | Wellstein | Kirsche | 2009 | p=}}
* {{cite book | last=Wellstein | first=Hartmut | last2=Kirsche | first2=Peter | title=Elementargeometrie | publisher=Springer-Verlag | publication-place=Wiesbaden | date=2009-06-16 | isbn=978-3-8348-0856-1 | language=de}}
Named reference:
<ref name="i792">{{cite book | last=Wellstein | first=Hartmut | last2=Kirsche | first2=Peter | title=Elementargeometrie | publisher=Springer-Verlag | publication-place=Wiesbaden | date=2009-06-16 | isbn=978-3-8348-0856-1 | language=de | page=}}</ref>