* Playbill uses no punctuation in show titles.
For example: _Oklahoma!_
* The Broadway League uses apostrophes to mark omitted words.
For example: _Ain't Misbehavin'_
* The New York Times uses quotation marks for titles of individual works of art.
For example: "Oklahoma!"
* The Associated Press Stylebook uses italics for the titles of books, plays, and other complete works.
For example: _Oklahoma!_