Orrey, L., & Milnes, R. (1987). Opera, a concise history (Rev. and updated ed.). Thames and Hudson.
Lua i Stíl Chicago (17ú heag.)Orrey, Leslie, agus Rodney Milnes. Opera, a Concise History. Rev. and updated ed. New York, N.Y: Thames and Hudson, 1987.
Lua MLA (9ú heag.)Orrey, Leslie, agus Rodney Milnes. Opera, a Concise History. Rev. and updated ed. Thames and Hudson, 1987.
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