Shortened footnote and citation:
{{sfn|Herrera|2004|p=}}
* {{cite book | last=Herrera | first=Francisco | title=Enciclopedia de la guitarra | date=2004 | isbn=84-95026-80-5 | language=es}}
Named reference:
<ref name="x507">{{cite book | last=Herrera | first=Francisco | title=Enciclopedia de la guitarra | date=2004 | isbn=84-95026-80-5 | language=es | page=}}</ref>