Cita APA (7a ed.)

Gregor-Dellin, M. (1987). Richard Wagner. Henschelverlag.

Cita Chicago Style (17a ed.)

Gregor-Dellin, Martin. Richard Wagner. Berlin: Henschelverlag, 1987.

Cita MLA (8a ed.)

Gregor-Dellin, Martin. Richard Wagner. Henschelverlag, 1987.