ISBN 0-631-22039-9. (原始内容存档于2016-12-07). Clauson, Gerard. Studies in Turkic and Mongolic linguistics. Taylor & Francis. 2002: 38 [2019-08-26]. ISBN 0-415-29772-9.
Moloney, Ed. A Secret History of the IRA. Penguin Books. 2002. xiv. ISBN 0-14-101041-X. Murray, Gerard & Tonge, Jonathan. Sinn Féin and the SDLP: From Alienation