Traveling outside US

[immihelp]

I am a permanet resindence as direct result of asylum. I haven't seen my dad for 9 years, now he is traveling to europe for visit this coming month October. What is the quickest way to get a travel document? And how long does it take?
Thanks in Advance!

[immihelp]

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https://www.immihelp.com/i-485-adjustment-of-status/advance-parole.html