What is the author's style in Ma Rainey's Black Bottom by August Wilson?

Wilson's play observes the three unities, criteria devised during the Renaissance and based roughly on Aristotle's theory of drama in his Poetics. These criteria include the unities of time, action, and place. The action of plays embodying them takes place during a single day and in a single place, and the plot clearly details the causal relationships between characters and action.