Metropolitan Opera annals, second supplement :
1957-1966 : a chronicle of artists and performances /
compiled by William H. Seltsam ; with a foreword by Frances Robinson.

APA Citation

Seltsam, W. H., Metropolitan Opera (New York, N. (1968). Metropolitan Opera annals, second supplement: 1957-1966 : a chronicle of artists and performances. New York: H.W. Wilson .

MLA Citation

Seltsam, William H, and N.Y.) Metropolitan Opera (New York. Metropolitan Opera Annals, Second Supplement: 1957-1966 : a Chronicle of Artists And Performances. New York: H.W. Wilson , 1968.

Warning: These citations may not always be complete (especially for serials).