NASB 1995
Demetrius has received a good testimony from everyone, and from the truth itself; and we add our testimony, and you know that our testimony is true.

American Standard Version
Demetrius hath the witness of all men , and of the truth itself: yea, we also bear witness: and thou knowest that our witness is true.

Berean Study Bible
Demetrius has received a good testimony from everyone, and from the truth itself. We also testify for him, and you know that our testimony is true.

Douay-Rheims Bible
To Demetrius testimony is given by all, and by the truth itself, yea and we also give testimony: and thou knowest that our testimony is true.

English Revised Version
Demetrius hath the witness of all men, and of the truth itself: yea, we also bear witness; and thou knowest that our witness is true.

King James Bible
Demetrius hath good report of all men, and of the truth itself: yea, and we also bear record; and ye know that our record is true.

World English Bible
Demetrius has the testimony of all, and of the truth itself; yes, we also testify, and you know that our testimony is true.

Young's Literal Translation
to Demetrius testimony hath been given by all, and by the truth itself, and we also -- we do testify, and ye have known that our testimony is true.

3 John 1:12 Additional Translations ...