Cita APA (7a ed.)

(1926). Sonaten-Abend: Ella Mertins, August Hewers. [s.n..

Cita Chicago Style (17a ed.)

Sonaten-Abend: Ella Mertins, August Hewers. Danzig: [s.n., 1926.

Cita MLA (9a ed.)

Sonaten-Abend: Ella Mertins, August Hewers. [s.n., 1926.