Harewood, / Earl of
Who's who in British opera
Edited by Nicky Adam
Foreword by The Earl of Harewood
Editors Brian Morton [and] Pamela Collins
With a preface by Brian Ferneyhough
Chicago: St. James Press, 1992, 1019 p.
Cummings, David M.
McIntire, Dennis K.
International who's who in music and musician's directory
(in the classical and light classical fields)
Twelfth edition 1990/91
Consultant editors David M. Cummings; Dennis K. McIntire
Cambridge, England: International Who's Who in Music, 1991
The new Grove dictionary of music and musicians