Shortened footnote and citation:
{{sfn | Pfriem | 2011 | p=}}
* {{cite book | last=Pfriem | first=Reinhard | title=Unternehmensstrategien | publisher=Metropolis-Verlag | publication-place=Marburg | date=2011 | isbn=978-3-89518-902-9 | language=de}}
Named reference:
<ref name="f633">{{cite book | last=Pfriem | first=Reinhard | title=Unternehmensstrategien | publisher=Metropolis-Verlag | publication-place=Marburg | date=2011 | isbn=978-3-89518-902-9 | language=de | page=}}</ref>