APA (7th ed.) Citation

McCarthy, M., & Whelan, R. F. (1991). 'And then there were twelve'. Archbishop Marsh's Library.

Chicago Style (17th ed.) Citation

McCarthy, Muriel, and Ruth F.T.C.D Whelan. 'And Then There Were Twelve'. Dublin: Archbishop Marsh's Library, 1991.

MLA (9th ed.) Citation

McCarthy, Muriel, and Ruth F.T.C.D Whelan. 'And Then There Were Twelve'. Archbishop Marsh's Library, 1991.

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