Cita APA (7a ed.)

Beethoven, L. v. Fidelio: Ópera , in two acts. The Royal Editio.

Cita Chicago Style (17a ed.)

Beethoven, Ludwig van. Fidelio: Ópera , in Two Acts. London: The Royal Editio.

Cita MLA (9a ed.)

Beethoven, Ludwig van. Fidelio: Ópera , in Two Acts. The Royal Editio.