Cita APA (7a ed.)

Wagner, R. (1907). Familienbriefe. [s.n.].

Cita Chicago Style (17a ed.)

Wagner, Richard. Familienbriefe. Berlin: [s.n.], 1907.

Cita MLA (9a ed.)

Wagner, Richard. Familienbriefe. [s.n.], 1907.