Documents needed for visitor visa.

[humor]

Hello

I would like to bring my parents here. They had been here when i was on H1. But now i have my greencard and my mom has a valid visa. My father need to apply for a visa. He had a B1/B2 visa earlier which has expired. So he need to apply for a visa.

I would like to know what all documents that i need to send from my side inorder for him to apply and get the visa.

Is there any difference or extra documents that i need to send since i got my GreenCard now.

Please give me the list of documents that i need to send.

Thanks.