APA (7th ed.) Citation

O'Brien, D. (1949). History of the O'Briens from Brian Boroimhe AD 1000 to 1945. B.T. Batsford.

Chicago Style (17th ed.) Citation

O'Brien, Donough. History of the O'Briens from Brian Boroimhe AD 1000 to 1945. London: B.T. Batsford, 1949.

MLA (9th ed.) Citation

O'Brien, Donough. History of the O'Briens from Brian Boroimhe AD 1000 to 1945. B.T. Batsford, 1949.

Warning: These citations may not always be 100% accurate.