Shortened footnote and citation:
{{sfn|Kaack|2020|p=}}
* {{cite book | last=Kaack | first=Ulf | title=Die deutschen U-Boote | publisher=GeraMond | publication-place=München | date=2020-03-25 | isbn=978-3-96453-270-1 | language=de}}
Named reference:
<ref name="h329">{{cite book | last=Kaack | first=Ulf | title=Die deutschen U-Boote | publisher=GeraMond | publication-place=München | date=2020-03-25 | isbn=978-3-96453-270-1 | language=de | page=}}</ref>