Shortened footnote and citation:
{{sfn | O'Callaghan | 2003 | p=}}

* {{cite book | last=O'Callaghan | first=Joseph F. | title=Reconquest and Crusade in Medieval Spain | publisher=University of Pennsylvania Press | publication-place=Philadelphia | date=2003 | isbn=0-8122-3696-3}}


Named reference:
<ref name="j518">{{cite book | last=O'Callaghan | first=Joseph F. | title=Reconquest and Crusade in Medieval Spain | publisher=University of Pennsylvania Press | publication-place=Philadelphia | date=2003 | isbn=0-8122-3696-3 | page=}}</ref>