BOSTON SYMPHONY ORCHESTRA: An Augmented Discography By James H. North. Foreword by James Levine. Lanham, Toronto, Plymouth: Scarecrow Press, 2008.
THE GROVE BOOK OF OPERA SINGERS Edited by Laura Macy. New York: Oxford University Press, 2005.
MOZART, HAYDN AND EARLY BEETHOVEN, 1781–1802 By Daniel Heartz. New York: W. W. Norton & Co., 2009.