Exploring Twentieth Century Vocal Music: A Practical Guide to Innovations in Performance and Repertoire by 
Reconfiguring Myth and Narrative in Contemporary Opera by 
The New Grove Dictionary of Music and Musicians by 
The New Grove Dictionary of American Music by 
The New Grove Dictionary of Opera by 
The Norton-Grove Dictionary of Woman Composers by 
The Oxford History of Western Music by 
The Oxford Handbook of Opera by 
Opera: A History in Documents by 
Black Opera: History, Power, Engagement by 
The Oxford Handbook of Music and Disability Studies by 
