I am having L1 visa , I want to invite my parents in USA

USA L1, L2 Visa
1

I am having L1- visa . from last 7 months i am in USA ,

I want to invite my parents in USA for 2 or 3 months.

Which Visa will be good for them. Which Doccuments are required ?

2

B-1/2 is the right visa for them.

Here is an article on the process and documentation: