Wagner, R. (2001). Wagner operas [computer file]: The complete vocal scores. CD Sheet Music Exclusive distributor.
Chicago-viite (17. p.)Wagner, Richard. Wagner Operas [computer File]: The Complete Vocal Scores. [United States], [Bryn Mawr: CD Sheet Music Exclusive distributor, 2001.
MLA-viite (9. p.)Wagner, Richard. Wagner Operas [computer File]: The Complete Vocal Scores. CD Sheet Music Exclusive distributor, 2001.
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