1. ^{{cite book|last1=Coogan|first1=Tim Pat|title=Wherever Green is Worn: The Story of the Irish Diaspora|publisher=Head of Zeus Ltd|isbn=9781784975395|url=https://books.google.com/books?id=LiJlCwAAQBAJ&dq=%22Killeen+Gang%22&source=gbs_navlinks_s|language=en}}
2. ^{{cite book|last1=Cullen|first1=Kevin|last2=Murphy|first2=Shelley|title=Whitey Bulger : America's most wanted gangster and the manhunt that brought him to justice|date=2013|publisher=Norton & Company, Incorporated, W.W.|location=New York|isbn=9780393087727|page=90|edition=First edition.}}