Okla. Stat. tit. 12, § 12-620
Reference by district or superior court - Report and
transcript - Filing.
In all actions referred to a referee by the district or superior
court, with directions to make findings of fact and conclusions of
law and to report the evidence to the court, the referee must file a
written report of his findings of fact and conclusions of law and
the transcript of the testimony with the clerk of the court.