Cita APA (7a ed.)

Wagner, R. (1920). Briefe an Frau Julie Ritter. [s.n.].

Cita Chicago Style (17a ed.)

Wagner, Richard. Briefe an Frau Julie Ritter. München: [s.n.], 1920.

Cita MLA (9a ed.)

Wagner, Richard. Briefe an Frau Julie Ritter. [s.n.], 1920.