Gaya APA
Batta, A, &, N, S, , (.
(2000).
Opera: Composers, works, performers.
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Cologne:
Cologne Kömemann.
Gaya MLA
Batta, András, &, Neef,, Sigrid, , (eds.).
"Opera: Composers, works, performers. ".
Cologne:
Cologne Kömemann,
2000.
Buku.