APA-viite (7. p.)

Ewans, M. (2016). Performing opera: A practical guide for singers and directors. Bloomsbury Methuen Drama.

Chicago-viite (17. p.)

Ewans, Michael. Performing Opera: A Practical Guide for Singers and Directors. London: Bloomsbury Methuen Drama, 2016.

MLA-viite (9. p.)

Ewans, Michael. Performing Opera: A Practical Guide for Singers and Directors. Bloomsbury Methuen Drama, 2016.