New King James Version
For they are spirits of demons, performing signs, which go out to the kings of the earth and of the whole world, to gather them to the battle of that great day of God Almighty.

King James Bible
For they are the spirits of devils, working miracles, which go forth unto the kings of the earth and of the whole world, to gather them to the battle of that great day of God Almighty.

American Standard Version
for they are spirits of demons, working signs; which go forth unto the kings of the whole world, to gather them together unto the war of the great day of God, the Almighty.

Berean Study Bible
These are demonic spirits that perform signs and go out to all the kings of the earth, to assemble them for battle on the great day of God the Almighty.

Douay-Rheims Bible
For they are the spirits of devils working signs, and they go forth unto the kings of the whole earth, to gather them to battle against the great day of the Almighty God.

English Revised Version
for they are spirits of devils, working signs; which go forth unto the kings of the whole world, to gather them together unto the war of the great day of God, the Almighty.

World English Bible
for they are spirits of demons, performing signs; which go forth to the kings of the whole inhabited earth, to gather them together for the war of that great day of God, the Almighty.

Young's Literal Translation
for they are spirits of demons, doing signs -- which go forth unto the kings of the earth, and of the whole world, to bring them together to the battle of that great day of God the Almighty; --

Revelation 16:14 Additional Translations ...