Cita APA (7a ed.)

Wagner, R., & Fisher, B. D. (2002). Wagner's The ring of the Nibelung. Opera Journeys.

Cita Chicago Style (17a ed.)

Wagner, Richard, y Burton D. Fisher. Wagner's The Ring of the Nibelung. Coral Gables, Fla.: Opera Journeys, 2002.

Cita MLA (8a ed.)

Wagner, Richard, y Burton D. Fisher. Wagner's The Ring of the Nibelung. Opera Journeys, 2002.