I think it’s official now. Another source: https://www.washingtonpost.com/politics/trump-chooses-sen-jeff-sessions-for-attorney-general-rep-mike-pompeo-for-cia-director-transition-sources-say/2016/11/18/a0c170ae-ad8e-11e6-a31b-4b6397e625d0_story.html
I follow @transition2017 on twitter. Excellent resource. Latest news and updates from the Presidential Transition Team.