Cita APA (7a ed.)

Czerny, P. (1972). Opernbuch. Henschelverlag.

Cita Chicago Style (17a ed.)

Czerny, Peter. Opernbuch. Berlin: Henschelverlag, 1972.

Cita MLA (8a ed.)

Czerny, Peter. Opernbuch. Henschelverlag, 1972.