Warren, R. (1995). Opera workshop: Studies in understanding and interpretation. Scolar Press.
Chicago Style (17. basım) AtıfWarren, Raymond. Opera Workshop: Studies in Understanding and Interpretation. Aldershot, Hants, Eng: Scolar Press, 1995.
MLA (9th ed.) AtıfWarren, Raymond. Opera Workshop: Studies in Understanding and Interpretation. Scolar Press, 1995.
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