Colossians 2:12

Having been buried with him in baptism, wherein ye were also raised with him through faith in the working of God, who raised him from the dead.

Buried with him in baptism ... Note that nothing is said here of baptism being accomplished without human hands, the same being an obvious impossibility. Note too that there is here the plainest reference to immersion as the action recognized by the apostles as being required in the baptism commanded by Christ. One may read bales of sophistry on this subject, but the simple truth is easy to see. See the parallel Pauline reference in Romans 6:3-5, together with comments in my Commentary on Romans.