* {{cite book | last=Carroll | first=Maureen | title=Spirits of the Dead | publisher=Oxford University Press | publication-place=Oxford | date=2006-10-12 | isbn=0-19-929107-1}}
<ref name="x677">{{cite book | last=Carroll | first=Maureen | title=Spirits of the Dead | publisher=Oxford University Press | publication-place=Oxford | date=2006-10-12 | isbn=0-19-929107-1 | page=}}</ref>