English Standard Version
For when Gentiles, who do not have the law, by nature do what the law requires, they are a law to themselves, even though they do not have the law.New International Version
(Indeed, when Gentiles, who do not have the law, do by nature things required by the law, they are a law for themselves, even though they do not have the law,Catholic Public Domain Version
For when the Gentiles, who do not have the law, do by nature those things which are of the law, such persons, not having the law, are a law unto themselves