Shortened footnote and citation:
{{sfn | Ricken | 1994 | p=}}
* {{cite book | last=Ricken | first=Friedo | title=Antike Skeptiker | publisher=C.H.Beck | publication-place=Müchen | date=1994 | isbn=3-406-34638-3 | language=de}}
Named reference:
<ref name="u652">{{cite book | last=Ricken | first=Friedo | title=Antike Skeptiker | publisher=C.H.Beck | publication-place=Müchen | date=1994 | isbn=3-406-34638-3 | language=de | page=}}</ref>