{{sfn|Castree|Kitchin|Rogers|2013|p=}}

* {{cite book | last=Castree | first=Noel | last2=Kitchin | first2=Rob | last3=Rogers | first3=Alisdair | title=A Dictionary of Human Geography | publisher=Oxford University Press, USA | publication-place=Oxford, Eng | date=2013-04-25 | isbn=978-0-19-959986-8 | oclc=812067154}}

<ref name="s411">{{cite book | last=Castree | first=Noel | last2=Kitchin | first2=Rob | last3=Rogers | first3=Alisdair | title=A Dictionary of Human Geography | publisher=Oxford University Press, USA | publication-place=Oxford, Eng | date=2013-04-25 | isbn=978-0-19-959986-8 | oclc=812067154 | page=}}</ref>