by Michael A. Dirr
Timber Press
ISBN 0-88192-641-8
by Toni Lawson-Hall and Brian Rothera
Timber Press
ISBN 0-88192-327-3
by Corinne Mallet
ISBN 2-9506523-4-4
by Glyn Church and Pat Greenfield (Photographer)
Hydrangeas - ISBN 1-55209-521-3
by Glyn Church
Complete Hydrangeas - SBN 1-55407-263-8
Michael Haworth-Booth
Constable and Company, Ltd. London
ASIN 0094603707
Daria Price Bowman
Michael Friedman Publishing Group, Inc.
ISBN 1-56799-737-6
Joan Harrison
Schiffer Publishing, Ltd.
ISBN 0764340557
C. J. van Gelderen and D. M. van Gelderen
Timber Press
ISBN 0881926221