USTR（米国通商代表部）、The United States Officially Withdraws from the Trans-Pacific Partnership（TPP離脱公式文書をTPP議長国（ニュージーランド）へ送付）（30日） 2017/2/1 官庁等情報 https://ustr.gov/about-us/policy-offices/press-office/press-releases/2017/january/US-Withdraws-From-TPP
