Warren, R. (1995). Opera workshop: Studies in understanding and interpretation. Scolar Press.
芝加哥风格引文Warren, Raymond. Opera Workshop: Studies in Understanding and Interpretation. Aldershot, Hants, Eng: Scolar Press, 1995.
MLA引文Warren, Raymond. Opera Workshop: Studies in Understanding and Interpretation. Scolar Press, 1995.
警告：这些引文格式不一定是100％准确.