Cita APA (7a ed.)

Hauptmann, G. (1913). Lohengrin. [s.n.].

Cita Chicago Style (17a ed.)

Hauptmann, Gerhart. Lohengrin. Berlin: [s.n.], 1913.

Cita MLA (9a ed.)

Hauptmann, Gerhart. Lohengrin. [s.n.], 1913.