Cita APA (7th ed.)

Wagner, R., & Wagner, R. (1888). [Der Ring der Nibelungen.]. Fritzsch.

Cita Chicago (17th ed.)

Wagner, Richard, i Richard Wagner. [Der Ring Der Nibelungen.]. Leipzig: Fritzsch, 1888.

Cita MLA (8th ed.)

Wagner, Richard, i Richard Wagner. [Der Ring Der Nibelungen.]. Fritzsch, 1888.