Cita APA (7a ed.)

Czerny, P. (1959). Opernbuch. Henschelverlag.

Cita Chicago Style (17a ed.)

Czerny, Peter. Opernbuch. Berlin: Henschelverlag, 1959.

Cita MLA (8a ed.)

Czerny, Peter. Opernbuch. Henschelverlag, 1959.