Indexes to plays can be found in the Reference collection near call number REF. PN1625. Some examples:
- An index to one-act plays: REF. PN1625 .L64
- Plays for children and young adults : an evaluative index and guide: REF. PN1627 .K37 1991
- Plays in periodicals; an index to English language scripts in twentieth century journals: REF. PN1625 .P37 1970
- An index to plays in collections at WIU Library: REF. PN1626 .I53 1999
There are a few indexes specifically for monologues near call number REF. PN2080:
- An index to monologs and dialogs: REF. PN2080 .I74 1949
- Ultimate monologue index (The Smith and Kraus monologue index): REF. PN2080 .S6 1999
Reference books on play adaptations for film or tv are in a few different locations:
- Enser’s filmed books and plays: REF. PN1997.85 .B37 1993
- Video versions : film adaptations of plays on video: REF. PN1997.85 .V53 2000
- Theatre : stage-to-screen-to-television: REF. PN2189 .L44
- American plays and musicals on screen: REF. PS338.M67 H57 2005
Literary criticism on plays:
- Critical survey of drama: REF. PR623 .C75 2003
- Critical survey of drama : foreign language series: REF. PN1625 .C74 1986
- Drama for students: REF. PN1601 .D595
- American drama criticism: REF. PS332 .A84 1979
- Shakespearean criticism: REF. PR2965 .S43
Biographical information about playwrights:
- Contemporary dramatists: REF. PR737 .C57
- Contemporary authors: REF. PN451 .C6
- American playwrights since 1945: REF. PS350 .A43 1989
- Twentieth-century American dramatists: REF. PS21 .D5 v.7
- Contemporary Black American playwrights and their plays: REF. PS153.N5 P43 1988