Alper, S. M. (1995). Next!: Auditioning for the musical theatre. Heinemann.
Lua i Stíl Chicago (17ú heag.)Alper, Steven M. Next!: Auditioning for the Musical Theatre. Portsmouth, NH: Heinemann, 1995.
Lua MLA (9ú heag.)Alper, Steven M. Next!: Auditioning for the Musical Theatre. Heinemann, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.