Bing found the following results
Apply for Citizenship | USCIS
Citizenship Definition & Meaning - Merriam-Webster
Citizenship - Wikipedia
Become a U.S. citizen through naturalization | USAGov
Citizenship | Definition, History, & Facts | Britannica
Application for Naturalization | USCIS
U.S. citizenship | USAGov
Citizenship of the United States - Wikipedia
USCIS - Citizenship What to Expect
Immigration and U.S. citizenship | USAGov