Shortened footnote and citation:
{{sfn | Callejas | 2018 | p=}}
* {{cite book | last=Callejas | first=Marco Lora | title=Germán Busch, El Centauro del Chaco | date=2018 | isbn=978-99974-0-177-9 | language=es}}
Named reference:
<ref name="s607">{{cite book | last=Callejas | first=Marco Lora | title=Germán Busch, El Centauro del Chaco | date=2018 | isbn=978-99974-0-177-9 | language=es | page=}}</ref>