APA (7th ed.) Citation

U.S. Citizenship and Immigration Services. (2009). Learn about the United States: Quick civics lessons for the naturalization test (Rev. 12, 2009.). U.S. Dept. of Homeland Security, U.S. Citizenship and Immigration Services.

Chicago Style (17th ed.) Citation

U.S. Citizenship and Immigration Services. Learn About the United States: Quick Civics Lessons for the Naturalization Test. Rev. 12, 2009. [Washington, D.C.]: U.S. Dept. of Homeland Security, U.S. Citizenship and Immigration Services, 2009.

MLA (9th ed.) Citation

U.S. Citizenship and Immigration Services. Learn About the United States: Quick Civics Lessons for the Naturalization Test. Rev. 12, 2009. U.S. Dept. of Homeland Security, U.S. Citizenship and Immigration Services, 2009.