Shortened footnote and citation:
{{sfn | Crastan | 2015 | p=}}
* {{cite book | last=Crastan | first=Valentin | title=Elektrische Energieversorgung 1 | publisher=Springer Vieweg | publication-place=Berlin Heidelberg | date=2015-08-19 | isbn=978-3-662-45984-3 | language=de}}
Named reference:
<ref name="b107">{{cite book | last=Crastan | first=Valentin | title=Elektrische Energieversorgung 1 | publisher=Springer Vieweg | publication-place=Berlin Heidelberg | date=2015-08-19 | isbn=978-3-662-45984-3 | language=de | page=}}</ref>