Ltd. 2009年: 第323頁. ISBN 0754671828 (英语). Poland to showcase its EU credentials in Brussels extravaganza. euobserver.com. 2010-06-08 [2010-08-05]. (原始内容存档于2021-03-14)
European Union Committee System. Governance. 2002, 15 (2): 185–210. doi:10.1111/1468-0491.00185. Lamming, Richard. The democratic credentials of the new
(The Royal Household), [2009-07-14], (原始内容存档于2009-02-16) Ambassadors credentials, Official website of the British Monarchy (The Royal Household), [2009-07-14]