O'Brien, C. C. (1973). States of Ireland. Vintage Books.
Chicago Style (17th ed.) CitationO'Brien, Conor Cruise. States of Ireland. New York: Vintage Books, 1973.
MLA (9th ed.) CitationO'Brien, Conor Cruise. States of Ireland. Vintage Books, 1973.
Warning: These citations may not always be 100% accurate.