APA

United States, . (2017). U.S. lawful permanent residents. [Washington, D.C.]: U.S. Department of Homeland Security, Office of Immigration Statistics, Policy Directorate.

Chicago

United States, . 2017. U.S. lawful permanent residents. [Washington, D.C.]: U.S. Department of Homeland Security, Office of Immigration Statistics, Policy Directorate.

Harvard

United States, . (2017). U.S. lawful permanent residents. [Washington, D.C.]: U.S. Department of Homeland Security, Office of Immigration Statistics, Policy Directorate.

MLA

United States, . U.S. lawful permanent residents. [Washington, D.C.]: U.S. Department of Homeland Security, Office of Immigration Statistics, Policy Directorate. 2017.