Where can i find info. on immigration rules/laws?

i'm looking to find out if i can bring my sisters w/ me, I'm filing for my mother and want to know if my sister can come with her if she's under 18 if so what do i have to do or who do i contact?

Answer:
United States Naturalization and Immigration Department or Homeland Security Department
uscis.gov
You can get the information at the USCIS website:http://www.uscis.gov/portal/site/uscis/m...

The immigration information post by website user , MyTend.com not guarantee correctness

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