Shortened footnote and citation:
{{sfn | Hartwig | 2004 | p=}}

* {{cite book | last=Hartwig | first=Dieter | title="Für die Ewigkeit, zeitlos, klar ..." | publisher=Convent Verl | publication-place=Hamburg | date=2004 | isbn=3-934613-75-6 | language=de}}


Named reference:
<ref name="q272">{{cite book | last=Hartwig | first=Dieter | title="Für die Ewigkeit, zeitlos, klar ..." | publisher=Convent Verl | publication-place=Hamburg | date=2004 | isbn=3-934613-75-6 | language=de | page=}}</ref>