Shortened footnote and citation:
{{sfn | Büttner | 2006 | p=}}

* {{cite book | last=Büttner | first=Nils | title=Herr P.P. Rubens | publisher=Vandenhoeck & Ruprecht | publication-place=Göttingen | date=2006 | isbn=3-525-47906-9 | language=de}}


Named reference:
<ref name="d446">{{cite book | last=Büttner | first=Nils | title=Herr P.P. Rubens | publisher=Vandenhoeck & Ruprecht | publication-place=Göttingen | date=2006 | isbn=3-525-47906-9 | language=de | page=}}</ref>