Some residents living in the United States would want to bring their parents to live permanently with them in the United States. They can sponsor their parents to visit them in the U.S. Following are the resources related to immigration of parents
An immigrant is a foreign national who is permitted to live and work permanently in the U.S. For your parent to become a legal immigrant there is a two step procedure.
This law governs the admissions of the immigrants to the U.S. For the section of the law related to immigrant visas for parents, you can take a look at INA § 201 and INA § 204. The specific eligibility requirements and procedures for applying for immigrant visas and permanent residence are included in the Code of Federal Regulations [CFR] at 8 CFR § 204.1, 8 CFR § 204.2 and 8 CFR § 245.