Joachim Koops, Gjovalin Macaj. The European Union as a Diplomatic Actor. Palgrave Macmillan. 2014 [2015-04-03]. ISBN 9781137356864. (原始内容存档于2015-04-14).
Betts, Lewis David. Harold Macmillan and appeasement: implications for the future study of Macmillan as a foreign policy actor. Contemporary British History