APA-čujuhus (7. p.)
Wagner, R., & Fisher, B. D. (2002). Wagner's The ring of the Nibelung. Opera Journeys.
Chicago-čujuhus (17. p.)
Wagner, Richard, juo Burton D. Fisher. Wagner's The Ring of the Nibelung. Coral Gables, Fla.: Opera Journeys, 2002.
MLA-čujuhus (9. p.)
Wagner, Richard, juo Burton D. Fisher. Wagner's The Ring of the Nibelung. Opera Journeys, 2002.
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