Shortened footnote and citation:
{{sfn | Penzlin | 2005 | p=}}

* {{cite book | last=Penzlin | first=Heinz | title=Lehrbuch der Tierphysiologie | publisher=Spektrum Akademischer Verlag | publication-place=München Heidelberg | date=2005-02-04 | isbn=3-8274-0170-4 | language=de}}


Named reference:
<ref name="j901">{{cite book | last=Penzlin | first=Heinz | title=Lehrbuch der Tierphysiologie | publisher=Spektrum Akademischer Verlag | publication-place=München Heidelberg | date=2005-02-04 | isbn=3-8274-0170-4 | language=de | page=}}</ref>