Shortened footnote and citation:
{{sfn | Petersohn | 1994 | p=}}

* {{cite book | last=Petersohn | first=Jürgen | title=Rom und der Reichstitel "Sacrum Romanum imperium" | publisher=Steiner | publication-place=Stuttgart | date=1994 | isbn=3-515-06562-8 | language=de}}


Named reference:
<ref name="n560">{{cite book | last=Petersohn | first=Jürgen | title=Rom und der Reichstitel "Sacrum Romanum imperium" | publisher=Steiner | publication-place=Stuttgart | date=1994 | isbn=3-515-06562-8 | language=de | page=}}</ref>