(原始内容存档于2019-07-26). Boffey, Daniel; Rankin, Jennifer. Michel Barnier: no grounds for reopening Brexit talks. The Guardian. 2019-09-12 [2021-07-30]. (原始内容存档于2021-07-30)
Capitalism Magazine mini-site. Opposes lobbying restrictions on free speech grounds. The Citizen's Guide to the U.S. Government - an online tutorial containing