The standard operas :
their plots, their music, and their composers /
by George P. Upton.
APA Citation
Upton, G. P. (George Putnam). (19071906). The standard operas: their plots, their music, and their composers. New ed., enl. and rev. Chicago: A.C. McClurg & Co..
MLA Citation
Upton, George P. (George Putnam), 1834-1919. The Standard Operas: Their Plots, Their Music, And Their Composers. New ed., enl. and rev. Chicago: A.C. McClurg & Co., 19071906.
Warning: These citations may not always be complete (especially for serials).