{{sfn|Diedrich|Ehlert|Wenzke|1998|p=}} * {{cite book | last=Diedrich | first=Torsten | last2=Ehlert | first2=Hans Gotthard | last3=Wenzke | first3=Rüdiger | title=Im Dienste der Partei | publisher=Ch. Links Verlag | publication-place=Berlin | date=1998 | isbn=978-3-86153-160-9 | language=de}}

<ref name="f219">{{cite book | last=Diedrich | first=Torsten | last2=Ehlert | first2=Hans Gotthard | last3=Wenzke | first3=Rüdiger | title=Im Dienste der Partei | publisher=Ch. Links Verlag | publication-place=Berlin | date=1998 | isbn=978-3-86153-160-9 | language=de | page=}}</ref>