The DeSart & Holbrook model is included in the econometric models component of the combined PollyVote. According to the model, Clinton will receive 34.2% of the two-party vote share in Oklahoma, while Trump will win 65.8%.
Putting the results in context
In general, however, you should not have too much faith in the results of single models, because they often contain large errors. At least, one should check how a model's results compare to benchmark forecasts.
Results compared to the combined PollyVote forecast
The latest PollyVote predicts Trump to gain 63.8% of the two-party vote in Oklahoma. The results of the DeSart & Holbrook model for Trump are thus 2.0 percentage points above the combined PollyVote in Oklahoma.