Source et copyright
Source: House of Commons Debates: European Council (Strasbourg), Tuesday 12 December 1989. Hansard Volume 163, 4th December 1989 - 15th December 1989. [ON-LINE]. [London]: Her Majesty's Stationary Office, [06.09.2005]. Available on http://www.parliament.the-stationery-office.co.uk/pa/cm198990/cmhansrd/1989-12-12/Debate-1.html.
Copyright: Crown copyright is reproduced with the permission of the Controller of Her Majesty's Stationery Office and the Queen's Printer for Scotland