I just wanted to make you aware of changes happening in the office of Graduate Studies under Dean Underwood. The whole website has been restructured and, in particular, the Guide for Theses and Dissertations has been revised. Among other changes, faculty committees now have the option to approve dissertations in MLA, Chicago, or Turabian style, as they deem appropriate.
For more information, please see http://www.utdallas.edu/ogs/current_students/dissertation_and_thesis/
MA Humanities portfolios should still be in MLA or Turabian style, and MA History theses in Chicago style.