↑ “Lawful Permanent Residents (LPR)”. United States Department of Homeland Security. ngày 2 tháng 10 năm 2018. Truy cập ngày 17 tháng 10 năm 2018. ("The term 'lawfully admitted for permanent residence' means the status of having been lawfully accorded the privilege of residing permanently in the United States as an immigrant...."); List of United States Supreme Court cases, volume, 459 U.S. 21, 32 (1982) ("once an alien gains admission to our country and begins to develop the ties that go with permanent residence, his constitutional status changes accordingly.").
↑ Wolfgang Tiede, Maximilian Yang: Zur Niederlassungserlaubnis für Ehegatten und minderjährige ledige Kinder Deutscher nach § 28 Abs. 2 des Aufenthaltsgesetzes, in DVBl. (Deutsches Verwaltungsblatt), Quyển 2/2015, tr. 66–72.
