These are the most useful and effective tools for finding scholarly articles in the area of Theatre studies. You can use these resources to search for information on specific aspects of acting, dramaturgy, and playwriting, as well as searching for other related terms.
Academic Search Premier
This covers a wide range of scholarship and is useful as a starting tool, but shouldn't be used in place of MLA (listed below). Towards the center of the screen is a box you can click to make sure everything you retrieve in your search is peer-reviewed and scholarly.
Modern Language Association International Bibliography (MLAIB)
The MLA Bibliography provides citations to scholarly articles containing literary criticism of plays as well as studies of playwrights in all modern world languages. It is well worth searching along with the above two resources.