Opera guide.
Edited, with an introd. by Harold Rosenthal. Translated by Anne Ross.

APA Citation

Westerman, G. von., Rosenthal, H. D. (19681964). Opera guide. New York: E.P. Dutton.

MLA Citation

Westerman, Gerhart von, and Harold D Rosenthal. Opera Guide. New York: E.P. Dutton, 19681964.

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