:

Date format:

2020-01-01 January 1, 2020 Jan 1, 2020 1 January 2020 1 Jan 2020

Shortened footnote and citation:
{{sfn | Krengel | 1991 | p=}}

* {{cite book | last=Krengel | first=Ulrich | title=Einführung in die Wahrscheinlichkeitstheorie und Statistik | publisher=Vieweg | publication-place=Braunschweig | date=1991-01 | isbn=3-528-27259-7 | language=de}}


Named reference:
<ref name="r220">{{cite book | last=Krengel | first=Ulrich | title=Einführung in die Wahrscheinlichkeitstheorie und Statistik | publisher=Vieweg | publication-place=Braunschweig | date=1991-01 | isbn=3-528-27259-7 | language=de | page=}}</ref>