{{sfn|Cobb|2011|p=}}
* {{cite book | last=Cobb | first=Ronald Lee | title=Islam, What You Need to Know in the Twenty-First Century | publisher=AuthorHouse | date=2011-08-10 | isbn=1-4634-1607-5}}
<ref name="t066">{{cite book | last=Cobb | first=Ronald Lee | title=Islam, What You Need to Know in the Twenty-First Century | publisher=AuthorHouse | date=2011-08-10 | isbn=1-4634-1607-5 | page=}}</ref>