Wagner, R., & Fisher, B. D. (2002). Wagner's The ring of the Nibelung. Opera Journeys.
芝加哥风格引文Wagner, Richard, 与 Burton D. Fisher. Wagner's The Ring of the Nibelung. Coral Gables, Fla.: Opera Journeys, 2002.
MLA引文Wagner, Richard, 与 Burton D. Fisher. Wagner's The Ring of the Nibelung. Opera Journeys, 2002.
警告：这些引文格式不一定是100％准确.