Shortened footnote and citation:
{{sfn | Wittstock | 2021 | p=}}

* {{cite book | last=Wittstock | first=Uwe | title=Franz Fühmann. Wandlung ohne Ende | publisher=Hinstorff Verlag GmbH | publication-place=Rostock | date=2021-10 | isbn=978-3-356-02378-7 | oclc=on1285266436 | language=de}}


Named reference:
<ref name="y767">{{cite book | last=Wittstock | first=Uwe | title=Franz Fühmann. Wandlung ohne Ende | publisher=Hinstorff Verlag GmbH | publication-place=Rostock | date=2021-10 | isbn=978-3-356-02378-7 | oclc=on1285266436 | language=de | page=}}</ref>