* {{cite book | last=Booker | first=M. Keith | title=Comics through Time [4 volumes] | publisher=Bloomsbury Publishing USA | publication-place=Santa Barbara | date=2014-10-28 | isbn=979-8-216-06328-5}}
<ref name="q634">{{cite book | last=Booker | first=M. Keith | title=Comics through Time [4 volumes] | publisher=Bloomsbury Publishing USA | publication-place=Santa Barbara | date=2014-10-28 | isbn=979-8-216-06328-5 | page=}}</ref>