Shortened footnote and citation:
{{sfn | Gruner | Osterloh | 2015 | p=}}
* {{cite book | last=Gruner | first=Wolf | last2=Osterloh | first2=Jörg | title=The Greater German Reich and the Jews | publisher=Berghahn Books | publication-place=New York | date=2015-01-01 | isbn=978-1-78238-444-1}}
Named reference:
<ref name="y421">{{cite book | last=Gruner | first=Wolf | last2=Osterloh | first2=Jörg | title=The Greater German Reich and the Jews | publisher=Berghahn Books | publication-place=New York | date=2015-01-01 | isbn=978-1-78238-444-1 | page=}}</ref>