The words are not in that small piece of Scripture you quoted, but are in other passages. At Pentecost, baptism is taught. In all 10 conversions in Acts, baptism is a central part. Paul himself was baptized to "wash away" his sins. If you look at the teaching of the entire New Testament, baptism is absolutely a part of the Gospel. A person who hears the Word, believes it, repents of their sins, confesses Jesus Christ as the Son of the living God, and is immersed for the remission of their sins has obeyed the Gospel.
This is a very interesting discussion.
My take is that all one needs to do to be saved is put your faith in Jesus believing that by his death on the cross our sins are removed, therefore repenting of sins and receiving new life. BECAUSE of such a salvation we should seek to do his will in everything, therefore will be baptized.
As we farther understand just what we have been saved from we will continue to become more obedient to scriptures and do our best to please Him. I see it as very simple.
It just is not there Period
You have a salvation of works my friend..