Shortened footnote and citation:
{{sfn | Feustel | 2015 | p=}}

* {{cite book | last=Feustel | first=Robert | title="Ein Anzug aus Strom" | publisher=Springer-Verlag | publication-place=Wiesbaden | date=2015-05-29 | isbn=978-3-658-09575-8 | language=de}}


Named reference:
<ref name="g168">{{cite book | last=Feustel | first=Robert | title="Ein Anzug aus Strom" | publisher=Springer-Verlag | publication-place=Wiesbaden | date=2015-05-29 | isbn=978-3-658-09575-8 | language=de | page=}}</ref>